Atomic Theory History

Front

What does the word 'atomos' mean?

Back

Indivisible

Front

What does the Bohr model suggest about electron movement?

Back

Electrons travel around the nucleus of an atom in orbits or definite paths.

Front

Who developed the first atomic theory?

Back

John Dalton

Front

Which scientist created the Bohr model?

Back

Niels Bohr

Front

What is the name of J.J. Thomson's model of atomic structure?

Back

Plum Pudding Model

Front

What is the main idea of Dalton's atomic theory?

Back

All matter is made of atoms, which are indivisible and indestructible.

Front

What did Rutherford's gold foil experiment demonstrate?

Back

The existence of a small, dense nucleus within the atom.

Front

What is the significance of the electron cloud model?

Back

It describes the regions around the nucleus where electrons are likely to be found.

Front

What did Democritus contribute to atomic theory?

Back

He proposed that matter is made up of small, indivisible particles called atoms.

Front

What is the main difference between the Bohr model and the quantum mechanical model?

Back

The Bohr model has fixed orbits for electrons, while the quantum mechanical model describes electron positions in terms of probabilities.