Atomic model and theorists

Front

Who developed the first atomic theory based on scientific experimentation?

Back

John Dalton

Front

What did Rutherford conclude from his 'Gold Foil' experiment?

Back

Gold atoms have a small dense nucleus.

Front

What makes each element different?

Back

The number of protons.

Front

Which subatomic particle has a positive charge?

Back

Proton.

Front

Which subatomic particle has a negative charge?

Back

Electron.

Front

What is the center of an atom called?

Back

Nucleus.

Front

What are the three main subatomic particles?

Back

Protons, neutrons, and electrons.

Front

What is the charge of a neutron?

Back

Neutral (no charge).

Front

How do you determine the atomic number of an element?

Back

By counting the number of protons in the nucleus.

Front

What is an isotope?

Back

Atoms of the same element with different numbers of neutrons.