History of the Atom

Front

Who used the cathode rays tube in his experiment?

Back

Thomson

Front

Who discovered the nucleus?

Back

Rutherford

Front

What is the bowling ball model of the atom?

Back

Dalton's model of the atom, which suggests that atoms are solid spheres.

Front

What law states that matter cannot be created or destroyed?

Back

Law of Conservation of Mass

Front

Who said that all copper atoms are identical in size, mass, and properties?

Back

Dalton

Front

What is Dalton's Atomic Theory?

Back

A theory that states that all matter is made of atoms, which are indivisible and indestructible.

Front

What did Thomson discover about the atom?

Back

He discovered the electron and proposed the 'plum pudding' model of the atom.

Front

What is the significance of Rutherford's gold foil experiment?

Back

It led to the discovery of the atomic nucleus and showed that atoms are mostly empty space.

Front

What did Bohr contribute to atomic theory?

Back

He proposed that electrons travel in specific orbits around the nucleus.

Front

What is the Law of Definite Proportions?

Back

A chemical compound always contains its component elements in fixed ratio by mass.