Atomic History (Scientists)

Front

Who was the first contributor to the atomic theory?

Back

Democritus

Front

What is Neils Bohr's contribution to the atomic theory?

Back

Created a model of the atom with electrons moving around the nucleus in fixed orbits.

Front

Who is credited with the formation of the 'plum pudding' model?

Back

JJ Thomson

Front

What does the term 'atomos' mean according to Democritus?

Back

Uncut or indivisible.

Front

Who proposed that the atom consists mostly of empty space?

Back

Ernest Rutherford.

Front

What did John Dalton propose about atoms of a given element?

Back

Atoms of a given element are identical.

Front

What is the main idea of Rutherford's gold foil experiment?

Back

Most of the atom is empty space, with a small, dense nucleus.

Front

What did JJ Thomson discover?

Back

The electron.

Front

What is the significance of the Bohr model of the atom?

Back

It introduced the idea of quantized energy levels for electrons.

Front

What did Democritus believe about the nature of matter?

Back

Matter is made up of small, indivisible particles called atoms.