Atomic Theory Review

Front

What are the positive particles of an atom?

Back

Protons are the positive particles of an atom.

Front

When is an atom electrically neutral?

Back

An atom is electrically neutral when the number of protons equals the number of electrons.

Front

Which particle determines the identity of an element?

Back

The proton determines the identity of an element.

Front

Who is known for the 'Plum Pudding' model of the atom?

Back

J.J. Thomson is known for the 'Plum Pudding' model of the atom.

Front

What is the central region of an atom called?

Back

The central region of an atom is called the nucleus.

Front

What are neutrons?

Back

Neutrons are neutral particles found in the nucleus of an atom.

Front

What are electrons?

Back

Electrons are negatively charged particles that orbit the nucleus of an atom.

Front

What is the charge of a proton?

Back

A proton has a positive charge.

Front

What is the atomic number?

Back

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

Front

What is the mass number?

Back

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