Atomic Theory History

Front

Who discovered the electron?

Back

J.J. Thomson

Front

Which scientist created the Bohr model of the atom?

Back

Niels Bohr

Front

What is the 'chocolate chip cookie' model of the atom?

Back

A model proposed by J.J. Thomson, where electrons are embedded in a positively charged 'cookie'.

Front

Was John Dalton's atomic theory earlier than Niels Bohr's?

Back

Yes

Front

Who developed the very first atomic theory?

Back

John Dalton

Front

What did John Dalton propose about atoms?

Back

Dalton proposed that atoms are indivisible and that each element consists of identical atoms.

Front

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

Back

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

Front

What did Niels Bohr contribute to atomic theory?

Back

Bohr proposed that electrons orbit the nucleus in fixed paths or energy levels.

Front

Who discovered the neutron?

Back

James Chadwick

Front

What is the main idea of the quantum mechanical model of the atom?

Back

It describes electrons as wave functions rather than fixed orbits.