Chemistry Semester Review

How many meters in a kilometer?

• 100
• 10
• 1000
• 1

Which of the following is an example of a mixture?

• Water
• Oxygen
• Sodium Chloride
• lemonade

How many protons does an atom of Carbon have?

• 6
• 4
• 12
• 14

Tags

NGSS.MS-PS1-1

In the formula, MgCl₂, what does the 2 tell you?

• Chlorine has 2 valence electrons
• Chlorine has a 2+ charge
• Chlorine has a 2- charge
• There are 2 Chlorine atoms

Tags

NGSS.MS-PS1-1

The compound potassium sulfate, K₂SO₄, is composed of

• 2 potassium, 1 sulfur, 4 oxygen

• 2 potassium, 4 sulfur, 4 oxygen

• two molecules of potassium and one molecule of sulfate

• one molecule of potassium and two molecules of sulfate

Tags

NGSS.MS-PS1-1

If an unknow substance cannot be broken down into simpiler substances, it is ...

• a compound
• an element
• a suspension
• a solution

If a mixture has components you can see it is a...

• solution
• compound
• homogeneous mixture
• heterogeneous mixture

The measure of how much space an object takes up is the _____.

• Matter
• Mass
• Volume
• Density

A heterogeneous mixture would be:

• gold
• chex mix
• chocolate milk
• water

What is the atomic symbol for Carbon?

• Ca

• C

• Cb

• Cn