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Introduction to Chemistry

An atom consists of a nucleus of protons and neutrons surrounded by a cloud of moving electrons.

Do you wonder what chemistry is or why you would want to study it? Take a look at answers to some basic questions about chemistry.

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Chemistry Spotlight10

How to Remove Rust Stains

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.

August 1 Science History

Learn about the history of science by reading about the significant scientific events that took place on this day in history.

Thermite Reaction

The thermite reaction is a highly exothermic reaction in which metal essentially burns. The thermite reaction has practical applications, such as for welding, plus it makes for a memorable chemistry demonstration. Here's how you can perform the thermite reaction, safely.

Chemical Snow Recipe

This is a recipe for chemical snow. This is a dry snow made from calcium silicate crystals. It's a fun crystal project or useful if you want snow that won't melt!

Simple Chemistry Life Hacks

These simple chemistry life hacks offer simple solutions to everyday problems.

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.

July 31 Science History

Learn about the history of science by reading about the significant scientific events that took place on July 31 in history.

What Is the Difference Between Flammable and Inflammable?

Flammable and inflammable are two words that are commonly confusing. Learn what flammable and inflammable mean and whether they are synonyms or antonyms.

What Is Denatured Alcohol?

This is an explanation of what denatured alcohol is and the ingredients in it.

Rules for Assigning Oxidation Numbers

Learn how to assign oxidation numbers to keep track of the distribution of electrons during a chemical reaction.

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