Atomic Theory

Front

What is the main component of an atom that was discovered by Rutherford?

Back

The nucleus.

Front

Who discovered neutrons?

Back

James Chadwick.

Front

What did Rutherford's experiments reveal about the structure of atoms?

Back

Atoms are mostly empty space.

Front

Which of Dalton's theories is incorrect?

Back

All atoms are identical.

Front

Who is credited with the discovery of electrons?

Back

J.J. Thomson.

Front

What is the charge of an electron?

Back

Negative.

Front

What is the charge of a proton?

Back

Positive.

Front

What is the mass of a neutron compared to a proton?

Back

Approximately equal.

Front

What is the atomic number of an element?

Back

The number of protons in the nucleus of an atom.

Front

What is the significance of the gold foil experiment?

Back

It demonstrated that atoms have a dense nucleus.