Atomic Theory

Front

Who discovered neutrons?

Back

Chadwick

Front

Who discovered that atoms have a nucleus?

Back

Rutherford

Front

What did Rutherford's experiments show about the structure of atoms?

Back

Atoms are mostly empty space.

Front

Who first proposed the idea of an atom and called them 'atomos'?

Back

Democritus

Front

Which of Dalton's theories is incorrect?

Back

All atoms are identical.

Front

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

Back

All matter is made up of indivisible atoms.

Front

What did J.J. Thomson discover about the atom?

Back

He discovered the electron.

Front

What is the significance of the gold foil experiment?

Back

It demonstrated that atoms have a small, dense nucleus.

Front

What is the charge of a neutron?

Back

Neutrons have no charge.

Front

What is the difference between an atom and a molecule?

Back

An atom is the smallest unit of an element, while a molecule is a group of atoms bonded together.