Elements, Molecules and Compounds

Front

What is a compound?

Back

A compound is a substance formed when two or more different elements bond together chemically.

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Front

Give an example of a compound.

Back

Sodium Chloride (NaCl) is an example of a compound.

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Front

What is the difference between a molecule and a compound?

Back

A molecule can consist of two or more atoms of the same or different elements, while a compound specifically consists of atoms from different elements.

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Front

What are elements?

Back

Elements are pure substances that cannot be broken down into simpler substances by chemical means.

Front

List some examples of elements.

Back

Examples of elements include Oxygen (O), Nitrogen (N), Hydrogen (H), and Calcium (Ca).

Front

What is a molecule?

Back

A molecule is a group of two or more atoms bonded together.

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Front

Is O2 a molecule or a compound?

Back

O2 is a molecule because it consists of two oxygen atoms bonded together, but it is not a compound since it contains only one type of element.

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Front

What is the chemical formula for water?

Back

The chemical formula for water is H2O.

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Front

What is the chemical formula for carbon dioxide?

Back

The chemical formula for carbon dioxide is CO2.

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Front

What is the significance of chemical formulas?

Back

Chemical formulas represent the elements in a compound and the ratio of atoms of each element.

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