Atomic structure

Front

What is the nucleus of an atom?

Back

The nucleus is the central part of an atom, containing protons and neutrons.

Front

What are the three main subatomic particles?

Back

Protons, Neutrons, and Electrons.

Front

What charge do protons have?

Back

Protons have a positive charge.

Front

What charge do neutrons have?

Back

Neutrons have no charge (they are neutral).

Front

What charge do electrons have?

Back

Electrons have a negative charge.

Front

How do protons and neutrons compare in mass?

Back

Protons and Neutrons have about the same mass.

Front

What does it mean for an atom to be neutral?

Back

An atom is neutral when it has an equal number of protons and electrons.

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 the nucleus.

Front

What is an ion?

Back

An ion is an atom that has gained or lost one or more electrons, resulting in a charge.