Chemistry 9

Who came up with the billiard ball model of the atom?

• Dalton

• Rutherford

• Crookes

• Bohr

How many decimetres is 4 milimetres?

• 0.4

• 40

• 0.04

• 400

What are electrons?

• Positively charged particles

• Negatively charged particles

• Electrons are made of atoms

Which statement is true?

• Rutherford was responsible for the cookie model of the atom

• Thomson came up with the beehive model of the atom

• Rutherford's gold foil experiment contributed to his model of the atom

• Bohr though that matter was made out of earth, water, fire, or air

Which term is used to describe the transformation of a liquid into a gas?

• Solidification/freezing

• Sublimation

• Condensation

• Evaporation

How many milimetres is 0.08 kilometres

• 0.08

• 80

• 80000

• 8000

What term is used to describe the transformation of a gas to a solid?

• Condensation

• Freezing

• Sublimation

• Deposition

Which statement is true?

• Boiling water (evaporation) requires energy

• Condensation requires energy

• Melting ice does not require energy

• Turning liquid water into ice (freezing) requires energy

What was the problem with Dalton's atomic theory?

• Atoms can join together to form molecules

• Atoms of different elements have different properties

• Matter is composed of atoms

• It did not explain electricity