Atomic Structure

Front

What are the three main subatomic particles in an atom?

Back

Protons, Neutrons, Electrons

Front

What is the charge of protons?

Back

Positive

Front

What is the charge of neutrons?

Back

Neutral

Front

What is the charge of electrons?

Back

Negative

Front

What determines the atomic number of an element?

Back

The number of protons in the nucleus.

Front

What is the mass of a neutron compared to a proton?

Back

Approximately equal; both have a mass of about 1 atomic mass unit (amu).

Front

What is the role of electrons in an atom?

Back

Electrons are involved in chemical bonding and determine the atom's reactivity.

Front

What is the nucleus of an atom composed of?

Back

Protons and Neutrons.

Front

What is the overall charge of an atom?

Back

Neutral, because the number of protons equals the number of electrons.

Front

What is an ion?

Back

An atom or molecule that has a net electric charge due to the loss or gain of one or more electrons.