Atomic History

Front

What can you conclude from the fact that scientists continue to update the atomic model?

Back

New information about atoms continues to be discovered.

Front

Who showed that the atom was mostly empty space and that the nucleus was small, dense, and positively charged?

Back

Ernest Rutherford.

Front

In an atom, what are the three types of subatomic particles?

Back

Protons (positively charged), Electrons (negatively charged), Neutrons (neutral).

Front

What did Rutherford observe in his Gold-Foil experiment?

Back

A small number of alpha particles bounced off the gold-foil at very large angles.

Front

Which scientist performed the Gold Foil Experiment?

Back

Ernest Rutherford.

Front

What is the charge of a proton?

Back

Positive.

Front

What is the charge of an electron?

Back

Negative.

Front

What is the charge of a neutron?

Back

Neutral.

Front

What is the nucleus of an atom composed of?

Back

Protons and Neutrons.

Front

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

Back

He discovered the electron and proposed the 'plum pudding' model.