Atoms and the Periodic Table

Front

What is an atom?

Back

The smallest particle into which an element can be divided and still retain its properties.

Front

What are subatomic particles?

Back

Particles that make up an atom, including protons, neutrons, and electrons.

Front

What is the nucleus of an atom?

Back

The central part of an atom that contains protons and neutrons.

Front

What charge do protons have?

Back

Positive charge.

Front

What charge do electrons have?

Back

Negative charge.

Front

What charge do neutrons have?

Back

No charge (neutral).

Front

What is the atomic number?

Back

The number of protons in the nucleus of an atom, which determines the element.

Front

What is a molecule?

Back

A group of two or more atoms bonded together.

Front

What is a subscript in a chemical formula?

Back

A number written below and to the right of a chemical symbol indicating the number of atoms of that element in a molecule.

Front

What is a coefficient in a chemical equation?

Back

A number placed in front of a chemical formula to indicate how many molecules are involved.