Front

The positively charged particles of an atom are the ________.

Back

protons

Front

On the periodic table, Groups are ________.

Back

Vertical columns

Front

What particle(s) have a charge?

Back

protons and electrons

Front

What's a valence electron?

Back

electrons in the outermost energy level

Front

What particle in the atom has no charge and a mass of 1?

Back

neutrons

Front

What is the charge of protons?

Back

Positive

Front

What is the charge of electrons?

Back

Negative

Front

What is the charge of neutrons?

Back

Neutral

Front

What is the atomic number of an element?

Back

The number of protons in the nucleus of an atom.

Front

What is the mass number of an atom?

Back

The total number of protons and neutrons in the nucleus.