Atomic Model

Front

What is the atomic particle with a positive charge?

Back

Proton

Front

What is the atomic particle with no charge?

Back

Neutron

Front

Who discovered that protons are found in the nucleus and that electrons move around the nucleus?

Back

Ernest Rutherford

Front

Who proposed that electrons have specific amounts of energy and move in specific orbits around the nucleus?

Back

Niels Bohr

Front

According to Ernest Rutherford, what is an atom mostly made of?

Back

Empty space

Front

What is the center of an atom called?

Back

Nucleus

Front

What are the negatively charged particles in an atom?

Back

Electrons

Front

What is the charge of a neutron?

Back

No charge (neutral)

Front

What did J.J. Thomson discover about the atom?

Back

He discovered the electron.

Front

What is the mass of a proton compared to an electron?

Back

A proton is much heavier than an electron.