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 is the charge of neutrons?

Back

Neutrons have a charge of 0 (neutral).

Front

What is an example of a compound?

Back

CO2 (carbon dioxide) is an example of a compound.

Front

How many protons are in a boron atom?

Back

Boron has 5 protons.

Front

What do atoms make up?

Back

Atoms make up all matter.

Front

What is the charge of electrons?

Back

Electrons have a -1 charge.

Front

What is the nucleus of an atom composed of?

Back

The nucleus is composed of protons and neutrons.

Front

What is the atomic number of an element?

Back

The atomic number is the number of protons in the nucleus of an atom.

Front

What is the mass number of an atom?

Back

The mass number is the total number of protons and neutrons in an atom's nucleus.