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Chemistry

Endothermic and exothermic reactions

A look at endothermic and exothermic reactions and the difference between them.

A look at endothermic and exothermic reactions.

What are diatomic elements?

Answering the question, what are diatomic elements?

A look at what diatomic elements are.

What does the atomic mass represent?

Answering the question, what does the atomic mass represent?

Understanding the atomic mass and atomic number.

Why does water expand when it freezes?

Header image for article answering the question why does water expand when it freezes?

An explanation of why water expands when it freezes.

Why is the ozone layer important?

Answering the question of why is the ozone layer important?

A look at why the ozone layer is important.

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