Unit 1 Classifying Matter

Front

What is a molecule?

Back

A molecule is a group of two or more atoms bonded together. All compounds are also molecules.

Front

What is a compound?

Back

A compound is a substance formed when two or more different elements are chemically bonded together. Examples include water (H2O) and methane (CH4).

Front

Identify the compound: Oxygen (O2), Carbon (C), Water (H2O), Nitrogen (N)

Back

Water (H2O) is the compound.

Front

Identify the compound: Helium (He), Sodium (Na), Methane (CH4), Neon (Ne)

Back

Methane (CH4) is the compound.

Front

How many atoms of oxygen are in carbon dioxide (CO2)?

Back

There are 2 atoms of oxygen in carbon dioxide (CO2).

Front

What is the element symbol for carbon?

Back

The element symbol for carbon is 'C'.

Front

What is the difference between an element and a compound?

Back

An element is a pure substance that cannot be broken down into simpler substances, while a compound is made up of two or more elements chemically combined.

Front

What is the chemical formula for water?

Back

The chemical formula for water is H2O.

Front

What does the subscript in a chemical formula indicate?

Back

The subscript in a chemical formula indicates the number of atoms of the element present in the molecule.

Front

What is the chemical formula for methane?

Back

The chemical formula for methane is CH4.