Front

Who developed the Billiard Ball model of the atom?

Back

John Dalton

Front

What is the charge of the nucleus of an atom?

Back

Dense and positively charged

Front

Which scientist is known for the planetary model of the atom?

Back

Niels Bohr

Front

What does the electron cloud model describe?

Back

The probable locations of electrons around the nucleus of an atom.

Front

Who proposed the idea of electrons existing in specific energy levels?

Back

Niels Bohr

Front

What is the main contribution of J.J. Thomson to atomic theory?

Back

Discovered the electron and proposed the Plum Pudding model.

Front

What is the significance of Ernest Rutherford's gold foil experiment?

Back

It led to the discovery of the nucleus and the understanding that atoms are mostly empty space.

Front

Who discovered the neutron?

Back

James Chadwick

Front

What is the Plum Pudding model?

Back

A model of the atom where electrons are embedded in a positively charged 'soup'.

Front

What does the term 'atomic number' refer to?

Back

The number of protons in the nucleus of an atom.