Chemistry: Most Popular Articles
Learn the difference between baking powder and baking soda and how to make ingredient substitutions if you're out!
Test your general science knowledge with this fun multiple choice quiz.
Baking powder and baking soda both are leavening agents that help baked goods to rise. They are not the same chemical, but you can substitute one for another in recipes. Here's how.
Take a multiple choice quiz to test yourself about general knowledge in chemistry.
Get examples of 10 chemical changes.
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.
Heterogeneous and homogeneous refer to mixtures of materials in chemistry. The difference between heterogeneous and homogeneous mixtures is the degree at which the materials are mixed together.
If you don't have buttermilk on hand, it's easy to apply a little kitchen chemistry to make buttermilk from regular milk. Here are 5 simple buttermilk recipes.
Physical changes involve a new form of matter, but no chemical reaction. This is a list of 10 examples of physical changes.
Here's a list of chemical elements ordered by increasing atomic number. The names and element symbols are provided.
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.
This is the definition of an independent variable.
Science fair and research projects apply the scientific method. Here's an explanation of the scientific method and how the scientific method is used.
A control group in a scientific experiment is a group separated from the rest of the experiment where the independent variable being tested cannot influence the results.
Learn about the difference between a scientific law, hypothesis, and theory.
Atom Basics Quiz - Test Your Chemistry Knowledge: structure quiz chemistry knowledge model of the atom question quiz science fundamentals
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.
Learn what crystal meth is, why people take crystal meth, how it's made, and what risks are associated with using methamphetamine.
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.
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.
Take a multiple choice quiz to test yourself about general knowledge in science.
Apple seeds do contain a small amount of cyanide, which is a lethal poison, but humans are protected from it in several ways.
At what temperature does water boil? What determines the boiling point of water? Here's the answer to this common question.
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.
The difference between a control group and an experimental group is one group is exposed to the conditions of the experiment and the other is not.
Here are some examples of physical changes and chemical changes, along with an explanation of how you can tell physical and chemical changes apart.
Percent error or percentage error expresses as a percentage the difference between an approximate or measured value and an exact or known value. Here is how to calculate percent error, with example calculations.
Find out what chemical and physical changes are, get examples, and learn how to tell them apart.
Here are examples of a scientific hypothesis and how to improve a hypothesis to use it for an experiment.
Metric to Metric Quiz - Test Your Chemistry Knowledge
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.
Learn about natural ways to repel mosquitoes and develop strategies to reduce your exposure to them.
This is an interactive periodic table or chart of the chemical elements. Click on an element symbol to get detailed information for each element.
The chemical volcano is the classic science fair project. Baking soda and vinegar combine to produce carbon dioxide, which builds up pressure in the center to cause an eruption of foamy lava. You can even color the lava to resemble a real volcanic eruption. This step-by-step recipe will show you how to make your own baking soda volcano.
Start learning chemistry with the basics. Learn what chemistry is, what chemists do, and why it's important to study chemistry.
Chemistry happens in the real world, not just a lab. Here are 10 examples of chemical reactions in everyday life.
Lab reports are an essential part of all laboratory courses and usually a significant part of your grade. If your instructor gives you an outline for how to write a lab report, use that. 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.
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.
Learn the one and two letter symbols for the chemical elements using this handy list.
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. Make dilutions by adding the correct volume of solvent to make a new solution.
This is an explanation of the difference between accuracy and precision.
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.
Use these step by step instructions to write and balance chemical equations.
Learn how to remove fluoride from drinking water.
Learn about the different types of chemical reactions and get examples of the reaction types.
Is it really possible to drink to much water? Learn about water intoxication and hyponatremia.
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.
Learn what significant figures are and how they are used with respect to scientific measurements and calculations.
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.
A dependent variable is the variable being tested in a scientific experiment.
It is easy to convert Celsius to Kelvin with these steps.
The scientific method is a method for conducting an objective investigation. The scientific method involves making observations and conducting an experiment to test a hypothesis. Here are the steps of the scientific method.
Rust stains can be a challenge to remove because some treatments actually set the stain rather than remove it. Use a little chemistry know-how to successfully remove a rust stain.
Here's a look at some of the career options available to you in the field of chemistry.
Learn to distinguish between ionic and covalent bonds, and determine whether a bond will be polar or nonpolar.
Learn about endothermic and exothermic chemical reactions and get instructions to perform your own hot and cold chemistry.
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.
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.
If you're tired of bubbles that pop as soon as you blow them, try this recipe for unbreakable bubbles!
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.
Here is a list of the 5 main branches of chemistry, along with an explanation of what each of the branches studies.
Learn about the different types of chemical bonds and the forces that affect the way electrons are shared.
This is a collection of safety signs commonly seen in a science laboratory, particularly a chemistry lab.
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.
Find out what alum is and the uses of alum.
Although Super Glue sticks to just about anything almost instantly, you can remove it, even from skin and clothes. Here's how to remove Super Glue or other cyanoacrylate adhesive.
Here is a look at what the molecular formula and empirical formula are and steps for finding the molecular formula and empirical formula.
Practice balancing chemical equations with this multiple choice quiz.
Here is an explanation of what chemical properties are, plus several examples of chemical properties of matter.
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.
Isotopes definition, as used in chemistry, chemical engineering, and physics.
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.
Download or print these PDF and PNG periodic tables to help work chemistry problems or to predict properties of the elements. The printable tables work well on mobile devices, such as Android phones, iPads as well as PC and Macs.
Learn how to make a smoke bomb. This is the list of materials required for making your own smoke bomb.
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.
Instructions for making your own chemical dip to polish silver.
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.
The reaction between baking soda and vinegar generates carbon dioxide gas, which is used in chemical volcanoes and other projects. Here is a look at the reaction between baking soda and vinegar and the equation for the reaction.
This is a classic recipe for homemade slime.
Learn how to distinguish between a chemical property and a physical property of matter.
The empirical formula of a chemical compound is a representation of the simplest whole number ratio between the elements comprising the compound. The molecular formula is the representation of the actual whole number ratio between the elements of the compound. This step by step tutorial shows how to calculate the empirical and molecular formulas for a compound.
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.
Here is how to define anode and cathode and how to remember which is which.
There are several branches of chemistry. Here is a list of the main branches of chemistry, with an overview of what each branch of chemistry studies.
Have you ever wondered why hair turns gray as you get older and whether there is something you can do to prevent graying or at least slow it down? Here's a look at what causes hair to turn gray and some of the factors that affect graying.
Take a multiple choice quiz to test yourself about the symbols for the first 20 elements.
Test your 6th grade general science knowledge with this fun multiple choice quiz.
There are seven elements that form diatomic molecules. This is a list of the seven diatomic elements.
List of materials that glow under ultraviolet or black light.
If you were an alchemical element which of the 5 elements would you be? The classic 5 elements of alchemy are earth, fire, air, water and aether. Which element best represents your personality? Take this fun multiple choice quiz to find out.
Here's a look at what you can do to stop hot peppers from burning, plus an explanation of why some home remedies actually make it worse.
Most elements are metals. This group includes the alkali metals, alkaline earth metals, transition metals, basic metals, and rare earth elements.
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.
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.
Basics of Acids and Bases Quiz - Test Your Chemistry Knowledge
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.
Are you confused about how chemical engineering differs from pure chemistry or other types of engineering? Here's an explanation of what chemical engineering is and what chemical engineers do.
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.
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.
If you were a famous mad scientist, which mad scientist would you be? Take this fun multiple choice quiz to find out.
Want to do science but don't have your own laboratory? Don't worry if you don't have a chemistry lab.This list of science activities will allow you to do experiments and projects with common materials you can easily find around your home.
Elements in the Human Body. Chemistry.
An ology is a discipline of study, as indicated by having the -ology suffix. This is a list of science ologies.
Water is a polar molecule. Here is the explanation for why water is a polar molecule and why water is a polar solvent.
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.
Atomic Structure Quiz - Test Your Chemistry Knowledge
Mixing bleach and vinegar is a bad idea. Toxic chlorine gas is released, which essentially serves as a way to wage chemical warfare on yourself. Many people mix bleach and vinegar, knowing it's dangerous, but either underestimating the risk or else hoping for increased cleaning power. Here's what you should know about mixing bleach and vinegar, before you try it.
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.
Get step-by-step instructions for making classic slime.
Chemical Bonds & Compounds Chemistry Quiz: electron dot structures ionic covalent bonds lewis electron dot structures chemistry quiz chemistry quizzes
Get ideas for great high school science projects. These are projects targeted from the 9-12 grade educational level.
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.
These are examples of covalent bonds and covalent compounds.
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.
Here is a look a what muriatic acid is, where you can find it, and the uses of muriatic acid.
Test your general science knowledge of 9th grade science with this fun online multiple choice quiz.
Test your periodic table knowledge with this fun multiple choice quiz.
It is easy to convert Kelvin to Celsius with these steps.
Get examples of types of solids, liquids, and gases and learn about the transitions or phase changes between them.
Here are examples of ionic bonds and ionic compounds.
Have you ever had a ring turn your finger green or wondered why some people say rings turn their fingers green? The reason this happens is because of the metal content of the ring. Here's a look at what's happening.
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.
Chemistry Laboratory Safety Quiz - Test Your Chemistry Knowledge
Chemistry is a big part of your everyday life. You find chemistry in daily life in the foods you eat, the air you breathe, your soap, your emotions and literally every object you can see or touch. Here's a look at some everyday chemistry.
Could you pass an 8th grade science quiz? Test your general science knowledge with this fun multiple choice quiz.
If you add food coloring to milk, not a whole lot happens, but it only takes one simple ingredient to turn the milk into a spinning color wheel. Here is what you do.
Scientific Method Quiz - Chemistry Tests and Quizzes
This chart shows the colors of the typical 1970s mood ring and the meanings associated with the mood ring colors.
Who is the Father of Chemistry? Here is a look at the best answers to this question and the reasons why each of these people might deserve the title.
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.
Element Symbol Quiz - Test Your Chemistry Knowledge
If you've ever experienced a sudden stabbing pain in your forehead when eating ice cream or enjoying a cool drink then you know what brain freeze is. Do you know what causes brain freeze or how you can stop the pain?
Learn what to expect if you encounter tear gas and take steps to minimize your exposure and speed your recovery.
Learn about chemical composition of the Earth's air. Percentages of the most common compounds are given, according to volume.
Molarity is a unit of concentration measuring the number of moles of a solute per liter of solution. The strategy to solving molarity problems is fairly simple. This outlines a straightforward method to calculate molarity of a solution.
Here are the names and formulas of some of the common acids and bases.
Make your chemistry laboratory experience safe by following these simple rules.
No one wants to live next door to a meth lab, but how do you know if there is one in your neighborhood? One way you might suspect illegal drugs are being made is by their smell.
Find out why you cry when you cut onions and how you can keep it from happening.
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.
Gas Constant (R) definition, as used in chemistry, chemical engineering, and physics.
Functional groups are collections of atoms in a molecule that participate in characteristic reactions. If you are taking organic chemistry, it's a good idea to memorize important functional groups or at least bookmark a past listing functional groups so that you can refer to it.
Review how to calculate pH and what pH means with respect to hydrogen ion concentration, acids, and bases.
Do you think you have a basic understanding of chemistry? Take a multiple choice quiz to test yourself about general knowledge in chemistry.
It's possible to make dry ice at home. Here are instructions and safety information on how to do it.
Mixing bleach and alcohol is a bad idea because the chemicals react to make chloroform. Here's a look at what happens and the risks associated with mixing these chemicals.
You can make natural insect repellent yourself. The insect repellent is safe and effective, plus it costs much less to make it than to buy it.
One of the most common types of experiment is a controlled experiment. Here is a look at what a controlled experiment is and why this type of experiment is so popular.
These are the strong acids. There are only six strong acids, so you might want to commit the list of strong acids to memory.
Use this chemistry glossary to look up the definitions of chemistry terms beginning with the letter A.