History of the atom

Who said that atoms were "INDIVISIBLE"?

• Rutherford

• Thomson

• Dalton

• Bohr

What word means "Cannot be broken apart"?

• separable
• indivisible
• divisible
• fragmented

Who discovered the electron?

• Albert Einstein
• Niels Bohr
• Isaac Newton
• J.J. Thomson

What was JJ Thomson's Atomic model called?

• Quantum Mechanical Model
• Bohr Model
• Rutherford Model
• Plum Pudding Model

Which describes the plum pudding model?

• A positively charged sphere with electrons in.

• A hollow sphere filled with gas particles.
• A solid sphere made of protons.

• A negatively charged sphere with no electrons.

Who discovered the proton?

• James Chadwick
• J.J. Thomson
• Niels Bohr
• Ernest Rutherford

What did Rutherford fire at gold leaf in his experiment?

• Beta particles
• Neutrons
• Alpha particles
• Protons

What did most of the alpha particles do in Rutherford's experiment?

• Some alpha particles exploded when they hit the foil.

• All of the alpha particles were deflected

• Most were absorbed by the foil.

• Most passed through the foil

The fact that most alpha particles passed through the gold foil tells us ...

• The atom is mostly empty space.
• Atoms are made up entirely of protons and neutrons.
• Alpha particles are negatively charged.
• The gold foil is solid and impenetrable.

In Rutherford's experiment a few alpha particles ...

• scattered in all directions
• were absorbed completely
• passed straight through
• Bounced Back