Atomic theory History of the atom

Front

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

Back

Matter is made of atoms that cannot be created or destroyed.

Front

Which scientist proposed that everything is made of tiny particles surrounded by empty space?

Back

Democritus.

Front

What was Bohr's model of the atom compared to?

Back

A planetary or solar system.

Front

What did Ernest Rutherford discover using the gold foil experiment?

Back

The proton.

Front

What are the four main rules of atomic theory proposed by John Dalton?

Back

1. All matter is made of atoms. 2. Atoms are indivisible and indestructible. 3. All atoms of a given element are identical in mass and properties. 4. Compounds are formed by a combination of different kinds of atoms.

Front

Who is known as the father of modern chemistry?

Back

John Dalton.

Front

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

Back

He discovered the electron.

Front

What is the charge of a proton?

Back

Positive.

Front

What is the charge of an electron?

Back

Negative.

Front

What is the charge of a neutron?

Back

Neutral.