Atomic Theory

Front

What does the word 'atom' mean in Greek?

Back

Indivisible

Front

Who proposed the 'Plum Pudding' model of the atom?

Back

J.J. Thomson

Front

What particle in the nucleus has no charge?

Back

Neutron

Front

What did Rutherford's gold foil experiment demonstrate?

Back

There is a dense positively charged nucleus at the center of an atom.

Front

What was John Dalton's contribution to atomic theory?

Back

He discovered that every element consisted of one type of atom.

Front

What is the charge of a proton?

Back

Positive

Front

What is the charge of an electron?

Back

Negative

Front

What is the nucleus of an atom composed of?

Back

Protons and neutrons

Front

What did Democritus propose about atoms?

Back

He proposed that atoms are the smallest indivisible particles.

Front

What is the atomic number of an element?

Back

The number of protons in the nucleus of an atom.