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Chemistry: Most Popular Articles

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How To Substitute Baking Powder and Baking Soda
Baking powder and baking soda are leavening agents that help baked goods to rise. Here is exactly how to substitute baking powder and baking soda.
Know the Difference Between Baking Powder &...
Baking powder and baking soda both are used to make baked goods rise. Learn the difference between baking powder and baking soda and how to make ingredient substitutions if you run out of one and not the other.
Science Quiz - Test Your General Science...
Test your general science knowledge with this fun multiple choice quiz.
10 Examples of Chemical Changes That We...
Chemical changes occur when chemical reactions between substances form new products. Get examples of 10 chemical changes in everyday life.
10 Examples of Physical Changes
Physical changes involve a new form or shape of matter, but no chemical reaction. This is a list of 10 examples of physical changes.
20 Chemistry Questions Quiz - 20 Chemistry...
Take a multiple choice quiz to test yourself about general knowledge in chemistry.
Why Does a Big Turkey Dinner Make You So Sleepy?
Find out why everyone wants to take a nap after the big Thanksgiving Day feast. Let's talk turkey and learn about L-tryptophan and carbohydrate metabolism.
Atom Basics Quiz - Test Your Chemistry Knowledge
Atom Basics Quiz - Test Your Chemistry Knowledge: structure quiz chemistry knowledge model of the atom question quiz science fundamentals
What Are the 7 Diatomic Elements?
There are seven elements that form homonuclear diatomic molecules or simple molecules with their own atoms. This is a list of the 7 diatomic elements.
Quick Chemistry Facts About the Ideal Gas...
The gas constant or R is an important constant in the ideal gas law. This is the definition and value of the gas constant.
How to Calculate the Concentration of a...
Calculating concentration is a basic skill needed by chemistry students. This is a list of steps and examples to calculate the concentration of chemical solutions in percent composition by mass, volume percent, molarity, molality, and normality.
This Is How To Calculate Percent Error
Percent error or percentage error is the difference between an approximate or measured value and an exact or known value. Here is how to calculate percent error.
20 Science Questions Quiz - 20 Science Facts...
Take a multiple choice quiz to test yourself about general knowledge in science.
10 Examples of Chemical Reactions in Everyday...
Chemistry happens in the real world, not just a lab. Here are 10 examples of chemical reactions in everyday life.
Heterogeneous and Homogeneous Mixtures: What's...
Heterogeneous and homogeneous refer to mixtures of materials in chemistry. Learn about the difference between these mixtures and get examples of each type.
What Temperature Does Water Boil?
At what temperature does water boil? What determines the boiling point of water? Here's the answer to this common question.
Easy Way To Grow Borax Crystal Snowflakes
It's easy to grow your own sparkling clear or colored borax crystal snowflakes. Here's what you do.
5 Simple Buttermilk Recipes
If you don't have buttermilk, it's easy to apply a little kitchen chemistry to make it from regular milk. Here are 5 simple buttermilk recipes to try.
How To Build a Classic Baking Soda Volcano
The chemical volcano is the classic science fair project. This step-by-step recipe will show you how to make your own baking soda volcano.
What Is the Difference Between Organic and...
Organic compounds and inorganic compounds form the basis for chemistry. Here is a look at the difference between organic and inorganic compounds, plus examples of each type.
Is It Okay To Drink Distilled Water?
Distillation is one method of water purification. Is distilled water safe to drink or as good for you as other types of water? The answer depends on a few different factors.
Which Element Are You? - Element Personality Quiz
Which chemical element are you? Technically speaking, you mostly consist of carbon, hydrogen, and oxygen, but which element best represents your personality? Take this fun multiple choice quiz to find out.
Understand the Difference Between Independent...
The difference between independent and dependent variables in a scientific experiment is which variable is being measured. Here's an explanation of how to tell these critical variables apart.
What Is the Difference Between a Cation and an...
Cations and anions are both ions. The difference between a cation and an anion is the net electrical charge of the ion. Here are the details on the difference and how to tell them apart.
What Is Borax and Where Can You Get It?
Borax is a common household and commercial chemical. Here's a look at what borax is, some facts about borax and how you can get borax.
What Is the Freezing Point of Water?
What is the freezing point of water or the melting point of water? Are the freezing point and melting point the same? Are there any factors that affect the freezing point of water? Here's a look at the answers to these common questions.
Differences Between DNA and RNA
Although DNA and RNA both carry genetic information, there are quite a few differences between them. This is a comparison of the differences between DNA versus RNA, including a quick summary and a detailed table of the differences.
What's the Difference Between Chemical and...
Here are some examples of physical changes and chemical changes, along with an explanation of how you can tell physical and chemical changes apart.
Interactive Periodic Table of the Elements
This is an interactive periodic table of the elements. Click on an element symbol to get detailed facts for each element.
Basics of Acids and Bases Quiz - Test Your...
Basics of Acids and Bases Quiz - Test Your Chemistry Knowledge
Why You Shouldn't Mix Bleach and Ammonia
Mixing bleach and ammonia is extremely dangerous, since toxic vapors will be produced. The primary toxic chemical formed by the reaction is chloramine vapor, with a potential for hydrazine formation. Here's a look at the chemical reactions involved in mixing bleach and ammonia, as well as some first aid advice if you accidentally become exposed to a bleach and ammonia mixture.
Equation for the Baking Soda and Vinegar Reaction
The reaction between baking soda and vinegar generates carbon dioxide gas, used in chemical volcanoes. Here is the equation for the reaction between baking soda and vinegar.
What's the Difference Between Ionic and...
Ionic and covalent bonds hold molecules together. Learn to distinguish between ionic and covalent bonds, and determine whether a bond will be polar or nonpolar.
Elements by the Numbers: From Hydrogen to...
Here's a list of all of the chemical elements of the periodic table ordered by increasing atomic number. The names and element symbols are provided.
What Is STP in Chemistry?
Here's an explanation of what STP is in chemistry and why it is useful, particularly when dealing with gases.
How Much of The Human Body Is Water?
Have you ever wondered how much of your body is water? The percentage of water varies according to your age and gender. Here's a look at how much water is inside you.
How to Write a Lab Report
Lab reports are an essential part of all laboratory courses and a significant part of your grade. Here's a format for a lab report you can use if you aren't sure what to write or need an explanation of what to include in the different parts of the report.
Can You Drink Hand Sanitizer or Get Drunk on It?
You may have heard about people drinking hand sanitizer to get drunk or get a buzz. Is it safe? What are the effects? Here are the answers!
How To Make Sulfuric Acid at Home
Sulfuric acid is a useful acid to have on hand for a variety of home chemistry projects. However, it is not easy to obtain. Fortunately, you can make it yourself.
How to Make a Bouncing Polymer Ball
Use chemistry to make a bouncing polymer ball, then alter the procedure to see the effect the changes have on the characteristics of the bouncing ball.
Ionic Compounds Nomenclature Quiz - Can You...
This multiple choice quiz covers ionic compound nomenclature. Test your ability to name ionic compounds and to write the formula of ionic compounds from their names.
What Are the Types of Chemical Reactions?
When you mix chemicals, you may get a chemical reaction. Learn about the different types of chemical reactions and get examples of the reaction types.
Convert Grams To Moles - Sample Problem
This worked example problem shows how to convert the number grams of a molecule to the number of moles of the molecule.
List 10 Types of Solids, Liquids, and Gases
Get examples of types of solids, liquids, and gases and learn about the transitions or phase changes between them.
Everything You Need to Know About Crystal Meth
Need crystal meth facts? Learn what crystal meth is, why people takeit, how it's made, and what risks are associated with using methamphetamine.
Independent Variable Definition and Examples
This is the definition of an independent variable, with examples. An independent variable is one of the key factors in a scientific experiment.
Common Examples of Covalent Compounds
These are examples of covalent bonds and covalent compounds.
Are Apple Seeds Poisonous?
Apple seeds do contain a small amount of cyanide, which is a lethal poison, but humans are protected from it in several ways.
Anode vs. Cathode: What's the Difference?
Here is how to define anode and cathode and how to tell them apart.
Element Picture Quiz - Test Your Recognition of...
Can you recognize the elements when you see them? Here's a quiz that tests your ability to identify an element based on its appearance.
3 Steps to Writing Balanced Chemical Equations
Balancing chemical equations is a key chemistry skill. Use these step by step instructions to write and balance chemical equations.
A List of the Strong Acids
These are the strong acids. There are only six strong acids, so you might want to commit the list of strong acids to memory.
Learn About Combustion Reactions
This is an overview of combustion reactions, including what they are, the general format for the reaction, and examples of combustion reactions.
What Does pH Stand For?
Have you ever wondered what pH stands for or where the term originated? Here is the answer to the question and a look at the history of the pH scale.
Periodic Table Quiz - Test Your Periodic Table...
Test your periodic table knowledge with this fun multiple choice quiz.
Understanding Endothermic and Exothermic...
Learn about endothermic and exothermic chemical reactions and get instructions to perform your own hot and cold chemistry experiments.
How to Remove Ball Point Pen Ink
Ball point pen ink is not a something that you can usually remove with simple soap and water, but there is an easy and inexpensive way to remove pen ink from surfaces or clothing. Here is what you do.
Get Printable Worksheets To Practice Balancing...
This is a collection of printable worksheets to practice balancing equations. The printable worksheets are provided in pdf format with separate answer keys.
Chemical Bonds & Compounds Chemistry Quiz
Chemical Bonds & Compounds Chemistry Quiz: electron dot structures ionic covalent bonds lewis electron dot structures chemistry quiz chemistry quizzes
What Are Chemical and Physical Changes?
Chemical and physical changes relate to matter properties. Find out what chemical and physical changes are, get examples, and learn how to tell them apart.
How to Calculate Mass Percent in Chemistry
Mass percent composition of a molecule shows the amount each element in a molecule contributes to the total molecular mass. This step by step tutorial will show the method to determine the mass percent composition of a molecule.
What Are Some Examples of Compounds with Ionic...
Ionic compounds form when elements share electrons. Here are examples of ionic bonds and ionic compounds.
Polyatomic Ions You Need To Know
This is a list of some of the most common polyatomic ions. It is worth committing the polyatomic ions to memory, including their molecular formulas and ionic charge.
What Are the Properties and Characteristics of...
Here are the properties shared by the ionic compounds.
Explanation of the Octet Rule
The octet rule states that elements gain or lose electrons to attain an electron configuration of the nearest noble gas. Here is an explanation of how that works and why elements follow the octet rule.
Balancing Equations Practice Quiz
Practice balancing chemical equations with this multiple choice quiz.
How Does the Fermentation Process Actually Work?
Fermentation is a process used to produce wine, beer, yogurt and other products. Here's a look at the chemical process that occurs during fermentation.
How to Convert Celsius to Kelvin
Celsius and Kelvin are two important temperature scales. It is easy to convert Celsius to Kelvin with these steps.
6 Homemade Modeling Clay Recipes
There are several ways you can make homemade clay for modeling, making ornaments, and for other projects and crafts. Here are several clay recipes, including a refrigerator clay, a clay you bake to harden, one you coat for a glossy finish, and one that works up and stays pliable much like store-bought modeling clay.
Science Experiments: What Are Variables?
Variables are an important part of science projects and experiments. Here is an explanation of what a variable is and a description of the different types of variables you'll encounter in science.
How To Make Non-toxic, Realistic Fake Snow
You can make fake snow using a common polymer. The fake snow is non-toxic, feels cool to the touch, and looks similar to the real thing.
Handy List of All the Element Symbols
The elements are the basis for all matter. Learn the one and two letter symbols for the chemical elements of the periodic table using this handy list.
How to Determine the Empirical and Molecular...
The empirical formula of a chemical compound is the simplest whole number ratio between the elements. The molecular formula is the actual whole number ratio between the elements. This step by step tutorial shows how to calculate the empirical and molecular formulas for a compound.
What Is an Isotope?
Isotopes are one form an element can take. This is the definition of an isotope, with examples.
What Is Alum?
Find out what alum is and the uses of alum.
3 Ways To Calculate Atomic Mass
The atomic mass or atomic weight of an element is a weighted average of all the element's isotopes based on their natural abundance. It is simple to calculate the atomic mass of an element with these steps.
Easily Restore Tarnished Silver with this...
These are instructions for making your own chemical dip to polish silver. No scrubbing required!
What Are the Strong Bases?
Strong bases are bases which completely dissociate in water. Here is a list of the most common strong bases.
Is It Really Safe To Eat Snow?
Have you ever caught a snowflake on your tongue? Learn whether or not it's safe to eat snow.
Metals vs. Nonmetals: What's the Difference?
Elements may be classified as either metals or nonmetals, based on their properties. Here's a look at the differences between the metals and nonmetals.
12 Easy Chemistry Projects You Can Do at Home
Want to do a chemistry projects but don't have your own laboratory? Here is a collection of experiments using common materials you have at home.
How to Calculate Normality of a Solution
The normality of a solution is the gram equivalent weight of a solute per liter of solution. Here's an example of how to calculate the normality of a solution.
What Is a Pure Substance?
A pure substance or chemical substance is a material that is homogeneous and has constant properties throughout the sample. Here are examples of pure substances.
Element Groups - Periodic Table of the Element...
Groups of Elements - This is an interactive periodic table of the elements.
What is the Bohr Model of the Atom?
The Bohr Model has an atom consisting of a small, positively-charged nucleus orbited by negatively-charged electrons. Here's a closer look at the Bohr Model, which is sometimes called the Rutherford-Bohr Model.
A Slimy Chemistry Experiment You Should Try
Get step-by-step instructions for making classic slime.
Learn What Chemical Properties Are and Get...
Here is an explanation of what chemical properties are, plus several examples of chemical properties of matter.
List of All the Elements That Are Metals
Most elements are metals. This group includes the alkali metals, alkaline earth metals, transition metals, basic metals, and rare earth elements.
6th Grade Science Quiz - Test Your 6th Grade...
Test your 6th grade general science knowledge with this fun multiple choice quiz.
What Is the Mole Unit of Measurement?
If you take chemistry, you need to know about moles. Find out what a mole is and why this unit is used in chemistry.
Periodic Table Trends - Periodic Table Quiz
Do you understand the trends of periodic table periodicity? Here's a ten question multiple choice quiz you can take to test your periodic table knowledge.
An Easy Way to Calculate Molarity of a Solution
Molarity is a unit of concentration measuring the number of moles of a solute per liter of solution. Here is how to calculate molarity of a solution.
9th Grade Science Test
Test your general science knowledge of 9th grade science with this fun online multiple choice quiz.
Baking Soda and Vinegar Erupting Volcano
The baking soda and vinegar volcano is the classic chemical volcano that you see at science fairs. Watch how easy it is to make a chemical volcano that produces a memorable eruption.
What You Need to Know to Calculate pH
Review how to calculate pH and what pH means with respect to hydrogen ion concentration, acids, and bases.
How Can I Get Fluoride Out of My Water?
Learn how to remove fluoride from drinking water.
Big Collection of Printable PDF Periodic Tables
Download or print these PNG and PDF printable periodic tables to help work chemistry problems or to predict properties of the elements.
What Are Examples of a Hypothesis?
Here are examples of a scientific hypothesis and how to improve a hypothesis to use it for an experiment.
What Are the Three Types of RNA? What Are Their...
One common homework and test question asks you to name the three types of RNA and list their functions. Here's the answer.
What Is a Synthesis Reaction in Chemistry?
A synthesis reaction or direct combination reaction is one of the most common types of chemical reactions. Here is a definition, explanation, and example of a synthesis reaction.
Why Onions Make You Cry
Find out why you cry when you cut onions and how you can keep it from happening.
What Makes Water a Polar Molecule?
Water is a polar molecule. Here is the explanation for why water is a polar molecule and why water is a polar solvent.
Why You Shouldn't Mix Bleach and Vinegar
Mixing bleach and vinegar is a bad idea because it produces toxic chlorine gas. Here's what you should know about mixing bleach and vinegar, before you try it.
Chem Students Should Know These Acid and Base...
Here are the names and formulas of some of the common acids and bases.
How to Make Homemade Slime (Classic Recipe)
This is a classic recipe for homemade slime. It's super-easy, plus I included tips for success.
Chemical Reaction Classification Quiz - Test...
There are many different types of chemical reactions. There are single and double displacement reactions, combustion, decomposition reactions and synthesis reactions. See if you can identify the type of reaction in this ten question chemical reaction classification quiz.
What Is the Difference Between Atomic Mass and...
There is a difference between the meanings of atomic mass and mass number. One is the average weight of an element and the other is the total number of nucleons in the atom's nucleus. Here's how to keep them straight.
Control vs. Experimental Group: How Do They...
Learn about the difference between the control group and the experimental group in a scientific experiment.
Which Mad Scientist Are You? - Mad Scientist...
If you were a famous mad scientist, which mad scientist would you be? Take this fun multiple choice quiz to find out.
What Is the Density of Water?
The density of water is related to its specific gravity. The density is the weight of the water per its unit volume, which depends on the temperature of the water. While you can round the density to 1 gram per milliliter, here are more precise values for you.
What Properties Make Metals Unique?
Most of the chemical elements are metals of one variety or another. Learn about some of the properties common to this large element group.
Understand the Difference Between Oxidation and...
Oxidation and reduction reactions involve an exchange of electrons between reactants. Here is how to tell which reactant was oxidized and which was reduced.
How to Make Flavored Rock Candy
Rock candy is candy made by crystallizing sugar. You can grow sugar crystals yourself, plus add color and flavor to make rock candy that you can eat.
What Is the Chemical Composition of Air?
Learn about chemical composition of the Earth's air. Percentages of the most common compounds are given, according to volume.
10 Atom Facts
Everything in the world consists of atoms, so it's good to know something about them. Here are 10 interesting and useful atom facts.
What Is the Most Conductive Element?
Here is a look at the three most electrically conductive elements. As you might expect, all three conductive elements are metals.
What Is Cream of Tartar?
Cream of tartar or potassium bitartrate is a common household chemical and cooking ingredient. Here's a look at what cream of tartar is, where it comes from, and how cream of tartar is used.
How to Calculate Mass Percent Composition
This is a worked example problem showing how to calculate mass percent composition.
Your Guide on How to Make Smoke Bombs
Learn how to make a smoke bomb. This is the list of materials required for making your own smoke bomb.
Chemistry 101: What Chemistry Is and Why You...
Start learning chemistry with the basics. Learn what chemistry is, what chemists do, and why it's important to study chemistry.
pH of Common Chemicals
pH is a measure of the acidity of a substance. Here's a table of the pH of several common chemicals.
Scientific Experiments: What Is a Control Group?
A scientific experiment may be designed with a control group. Here's a look at what a control group is and how it helps increase the validity of an experiment.
What Are the First 20 Elements?
Here are the first 20 elements and their symbols.
Why Do Cheap Rings Turn Your Fingers Green?
Have you ever had a ring turn your finger green? The reason this happens is because of the metal content of the ring. Here's a look at what's happening.
Try These 8th Grade Science Project Ideas
Get ideas for 8th grade science fair projects. These are experiments and topics suitable for upper middle school level science fair projects.
16 Things That Glow in Black or Ultraviolet Light
List of materials that glow under ultraviolet or black light.
Working on a Science Project? Start With the...
Science fair and research projects apply the scientific method. Here's an explanation of the scientific method and how the scientific method is used.
Calculate Root Mean Square Velocity of Gas...
This example problem demonstrates how to calculate the root mean square velocity of particles in an ideal gas.
Learn Key Acids and Bases Definitions
Understanding acids and bases is important for grasping chemistry concepts. Here's an introduction to acids and bases, with definitions for key acid and base terms.
What Molecular and Empirical Formula Are and...
Here is a look at what the molecular formula and empirical formula are and steps for finding the molecular formula and empirical formula.
Learn About the Halogens
The halogens are a specific group of nonmetals with some distinctive properties. Get facts about the location and characteristics of the halogens.
Examples of Endothermic Reactions
This is a list of chemical reactions that are endothermic reactions.
Metals Nonmetals and Metalloids - Periodic Table
This is a periodic table of the metals, metalloids, and nonmetals and a description of these major element groups.
What's the Difference Between a Scientific...
Learn about the difference between a scientific law, hypothesis, and theory.
Properties of Nonmetals
Get information about the common characteristics of the nonmetals.
The Difference Between Mass and Weight
The difference between mass and weight is one is the amount of matter in a material and the other is a measure of force acting on the material.
Can You Drink too Much Water?
Is it really possible to drink to much water? Learn about water intoxication and hyponatremia.
Hazard Symbol Quiz - Test Your Recognition of...
How well do you know laboratory safety signs and hazard symbols? Take this fun quiz to see if you can recognize potential dangers in the lab.
How To Make Saline Solution at Home
Saline solution refers to a salt solution, which you can prepare yourself using readily available materials. The solution can be used as a disinfectant, sterile rinse, or for labwork.
How to Calculate Theoretical Yield of a...
Before performing chemical reactions, it is helpful to know how much product will be produced with given quantities of reactants. This is known as the theoretical yield. Here's how to calculate it.
What Is the pH of Water?
The pH of water is a value you should know, plus it's good to understand why the actual pH of water might differ from the theoretical value.
18 Fun and Easy Slime Recipes
There's more than one way to make slime. Actually, there are lots of different recipes! Here are some of the best recipes for different types of slime, from normal slimy slime to eerie glow-in-the-dark slime.
How to Make Homemade Rock Candy or Sugar Crystals
These are step by step instructions for growing your own sugar crystals or rock candy.
Learn Chemistry with this Periodic Table Study...
See how elements are organized into element groups in the periodic table. Page 2.
pH of Household Products Quiz
pH of Household Products Quiz - See whether you know the pH of chemicals around your home.
Solubility Rules of Ionic Solids in Water
This is a list of the solubility rules for ionic solids in water. While it's a good idea to memorize them, the list is a good reference to use.
What Is a Molotov Cocktail?
You may have heard about Molotov cocktails on the new or seen them in video games, but do you know what they are? Here's a description of a Molotov cocktail and a little history of the device's invention.
Atomic Structure Quiz - Test Your Chemistry...
Atomic Structure Quiz - Test Your Chemistry Knowledge
How Does Soap Clean?
Have you ever wondered how soap cleans? Here's an explanation of how soap works and an introduction to saponification, surfactants and emulsifiers.
Do You Know Why Hair Turns Gray?
Have you ever wondered why hair turns gray as you get older and whether there is something you can do to prevent it? Here's what happens.
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