Review 1

Chemical vs Physical Change

Pure: Element or Compound

Compound: 2 or more different elements bonded

Mixture: Homogeneous or Heterogeneous

Pure vs Mixture

Unit 1 Matter

Multiple Choice

Fresh squeezed lemonade with sugar and ice is an example of

• element

• compound

• homogeneous mixture

• heterogeneous mixture

Multiple Choice

A copper wire contains

• element

• compound

• homogeneous mixture

• heterogeneous mixture

Multiple Choice

HCl is added to a sample of chalk. You see bubbles and steam. This is an example of

• chemical change

• physical change

• element

• compound

Multiple Select

You are explaining to a friend how you know that fireworks are a chemical change. Pick all of the the following observations that led you to that conclusion.

• precipitate

• light given off

• color change

• endothermic

Density of water is 1.00 g/mL

So mass of water = volume of water

​density = mass/volume

You still need to know the conversions for milli-;centi-; and kilo- at least!

​metric

Unit 2 Metric and Density

Multiple Choice

125 mL = ____ L

• 1.25

• 0.125

• 125000

• 12500

Multiple Choice

What is the mass of 55.6 mL of water?

• 55.6 g

• 0.556 g

• 55.6 kg

• cannot be determined

Multiple Choice

Mercury, a very dense, toxic liquid, has a density of 13.6 g/mL. What is the volume of a 68.0 g sample?

• 54.4

• 0.20

• 5

• 925

​Counting p,n,e

Dalton's Atomic Theory

Unit 3 Atoms

Multiple Choice

A sample has 21 protons, 23 neutrons and 19 electrons. What is it's symbol?

• K

• Ca

• Sc

• V

Multiple Choice

A sample has 21 protons, 23 neutrons and 19 electrons. What is its mass number?

• 40

• 44

• 44.89

• 47.87

Multiple Choice

A sample has 21 protons, 23 neutrons and 19 electrons. What is it's charge? Is it a cation or anion?

• +2

  cation

• +2

  anion

• -2

  cation

• -2

  anion

Multiple Choice

Which of the following was not part of Dalton's atomic theory?

• conservation of matter

• multiple proportions

• definite proportions

• isotopes