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Chemistry Feature Articles

Anne Helmenstine's Chemistry Content


You can make a colorful many-layered density column using common household liquids.

You can make a colorful many-layered density column using common household liquids.

Anne Helmenstine
Chemistry Features...

Natural Mosquito Repellent Recipe

Natural Insect Repellent Recipe

Kitchen Science Experiments

How to Make Paper

Science Picture Quizzes

Nernst Equation

Diving Ketchup Magic Trick

Scientist vs Engineer

Chemist Profile

Chemical Engineer Profile

Introduction to Molecular Geometry

Introduction to Buffers

Sugar & String Crystal Easter Eggs

Pepper & Water Science Magic Trick

Density Column Project

Ketchup & Baking Soda Volcano

Tris Buffer Recipe

Phosphate Buffer Recipe

Henderson-Hasselbalch Equation and Example

Breaking Bad Chemistry

Colored Crystal Recipes

Best Crystals for Beginners

St. Patrick's Day Science Projects

Fun Bubble Projects

4th of July Science Projects

Favorite Fire Projects

Easter Science

Alchemy Pictures & Images

Luminol Chemiluminescence Test for Blood

What Is the AP Program?

What Is the AP Chemistry Exam?

Salt & Vinegar Crystals

Baking Soda Stalagmites & Stalactites

Burning Bubbles

Salt Crystal Rings & Ferns

Ricin Poisoning Facts

AP Chemistry Course & Exam Topics

Citrus Flames Project

Boyle's Law Calculation

SI Units Review

Acid-Base Titration Calculation

Charles Law

Atomic Weight Calculation

Famous Black Scientists

Dilutions from Stock Solutions

Word Problem Strategy

Atomic Mass and Atomic Number

Solution Preparation

Mass of Liquids from Density

Experimental Error Calculations

Chalk Chromatography

Molecules with Strange Names Image Gallery

Lichtenberg Figures Photo Gallery

Today in Science History

pOH Calculations

pH Calculations

Accuracy & Precision Review

Lemon Fizz Project

Challenging Glassware Quiz

Glassware Quiz


Drug Paraphernalia Photo Gallery

Free Science Fair Project Pictures

Invisible Ink Revealed

Kids in Science Photo Gallery

Crack Cocaine Facts

Cocaine Facts

Marijuana Facts

Shampoo Recipe

Caffeine Science Fair Project Ideas

Magnetism Science Fair Project Ideas

Materials Science Fair Project Ideas

Environmental Science Fair Project Ideas

Make a Lava Lamp

Hangover Remedies & Prevention

How Tear Gas Works

Tear Gas Exposure

Marbled Paper Project

Magic Crystal Christmas Tree


Citric Acid Cycle


Perfume Recipe

Laundry Detergent Recipe

Bubble Science

Bubble Prints

Engineering Science Fair Projects

NSI Smithsonian Crystal Growing Kits Review

Nuclear Tests Photo Gallery

Insta-Snow Review

Snowflake Shapes

Holiday Science Projects

Copper Sulfate Crystals

Glowing Ice Sphere

Baking Ingredient Substitutions

Molotov Cocktails

Carbonated Fizzy Fruit

Re-Use a Turkey Thermometer

Science Projects Photo Gallery

Smithsonian Geode Kit Review

Crystal Geode Project

Laundry Detergent Glowing Skull

Magic Powerballs Review

Units of Measurement Quiz

Fried Green Egg Project

Kid-Friendly Elephant Toothpaste Demo

Science -ology Quiz

Dry Ice Science Fair Projects

Old Nassau or Halloween Reaction

Green Fire Halloween Jack-o-Lantern

Elephant Toothpaste Demo

Science Trivia Quiz #4

Magic Rocks - Review

Liquid Nitrogen Facts

Dry Ice Facts

-ology List of Sciences

Glowing Hand of Doom Punch

Dry Ice Crystal Ball

Science Quiz #3

Science Quiz #2

Science Quiz #1

Dry Ice Ice Cream Recipe

What Is Dry Ice?

Boiling Point Elevation

Freezing Point Depression

Metals List

Actinides List

Lanthanides List

Rare Earth Elements

Transition Metals List

Basic Metals List

Noble Gases List

Semimetals or Metalloids List

Halogens List

Alkali Metals List

Alkaline Earth Metals List

Nonmetals List of Elements

How to Light Fireworks Safely

Dry Ice Projects Photo Gallery

Lightning & Plasma Photo Gallery

Snow Ice Cream Recipes

Colored Flowers

Cloud in a Bottle Demonstration

Fireworks in a Glass

Toxic Elements

9th Grade Science Fair Projects

Igor-Ade Recipe

How to Find Original Science Fair Project Ideas

What Is a Science Fair Project?

Eyeball Party Cake

3rd Grade Science Fair Projects

4th Grade Science Fair Projects

5th Grade Science Fair Projects

09/04/08 - Red Fire Instructions
Red fire is easy to produce. This is a classic color for sparklers and fireworks as well as holiday parties. It would also be a cheery coloration for a campfire or fireplace.

09/04/08 - Violet Fire Instructions
It's very simple to make violet or purple fire. All you need are two easy-to-find ingredients.

09/03/08 - Memorize the Elements
Here is a mnemonic to help you memorize the first twenty elements in the periodic table.

09/02/08 - Make a Storm Glass
Use your knowledge of chemistry to make a storm glass to help you predict the weather.

08/27/08 - Science Fair Project Poster
Here's an example of how you can organize a science fair project poster to clearly display your use of the scientific method for your project.

08/24/08 - Halloween Science Projects
Are you ready for some spooky science? These projects and experiments are just right for Halloween. Make your holiday educational as well as fun!

08/23/08 - Mad Scientist Theme Party
A mad scientist party is a fun and educational party theme, ideal for birthdays and Halloween. Get ideas for invitations, decorations, costumes, food and drink, cakes, mad scientist experiments and games, as well as party favors for guests to take home.

08/21/08 - Which Mad Scientist Are You?
If you were a famous mad scientist, which mad scientist would you be? Take this fun multiple choice quiz to find out.

08/19/08 - Element Picture Quiz
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.

08/17/08 - Hazard Symbol Quiz
This fun multiple choice quiz tests your recognition of lab safety signs and symbols. If you fail this quiz you might want to avoid the chem lab until after you have reviewed the meanings of the signs.

08/06/08 - Aufbau Principle & Electronic Structure
Stable atoms have as many electrons as they do protons. How do these electrons orient themselves around the nucleus? They fill their electron orbitals by the aufbau principle.


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