Matter

Front

What is the basic unit of matter?

Back

An atom is the basic unit of matter.

Front

What subatomic particle has a positive charge?

Back

Protons have a +1 charge.

Front

What subatomic particle has a negative charge?

Back

Electrons have a -1 charge.

Front

What is a molecule made of two or more different types of atoms called?

Back

A compound.

Front

What is the atomic mass of boron?

Back

10.811.

Front

What is the charge of a neutron?

Back

Neutrons have no charge (neutral).

Front

What is the nucleus of an atom composed of?

Back

The nucleus is composed of protons and neutrons.

Front

What is the term for the number of protons in an atom?

Back

Atomic number.

Front

How do you determine the number of neutrons in an atom?

Back

Subtract the atomic number from the atomic mass.

Front

What is the significance of the atomic number?

Back

The atomic number determines the identity of an element.