Atomic Structure

Front

What part of an atom is used to identify it?

Back

The number of protons.

Front

What changes in the atomic structure when an atom becomes an ion, such as O^-2?

Back

The number of electrons changes.

Front

What is the mass number of an atom?

Back

The mass number is the number of protons plus the number of neutrons.

Front

What two subatomic particles must be equal for an atom to have no charge (neutral)?

Back

Protons and electrons must be equal.

Front

What are the charges of protons, electrons, and neutrons?

Back

Protons are positive, electrons are negative, and neutrons are neutral.

Front

What is an atom?

Back

An atom is the smallest unit of matter that retains the properties of an element.

Front

What are subatomic particles?

Back

Subatomic particles are the particles that make up an atom, including protons, neutrons, and electrons.

Front

Where are protons located in an atom?

Back

Protons are located in the nucleus of an atom.

Front

Where are electrons located in an atom?

Back

Electrons are located in the electron cloud surrounding the nucleus.

Front

What is the charge of a neutron?

Back

Neutrons have no charge; they are neutral.