History of the atom

Front

Who used the word 'atomos' to describe the indivisible atom?

Back

Democritus

Front

Which atomic model is represented by the picture of a 'plum pudding' structure?

Back

Thomson's atomic model

Front

Who proposed that electrons move around the nucleus in specific layers or shells?

Back

Bohr

Front

What is a particle with one negative charge called?

Back

Electron

Front

What is the correct order of scientists in the development of atomic theory from earliest to most recent?

Back

Democritus, John Dalton, JJ Thomson, Ernest Rutherford, Neils Bohr

Front

What did John Dalton contribute to atomic theory?

Back

He proposed that all matter is made of atoms, which are indivisible and indestructible.

Front

What is the charge of a proton?

Back

Positive charge.

Front

What did Ernest Rutherford discover about the atom?

Back

He discovered the nucleus and that atoms are mostly empty space.

Front

What is the mass of a neutron compared to a proton?

Back

A neutron has approximately the same mass as a proton.

Front

What is the significance of the gold foil experiment?

Back

It demonstrated that atoms have a small, dense nucleus.