Which of the following is a chemical change?

• Iron rusting
• Glass shattering into smaller pieces
• Liquid mercury solidifying when cooled
• Salt (sodium chloride) dissolves into water, making a solution

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What is the name of K₃P?

• Potassium (III) phosphide
• Tripotassium phosphide
• Potassium phosphide
• Tripotassium phosphorus

Which of the following has an indefinite (changing) shape?

• Solids
• Liquids
• Gases
• Both liquids and gases

Which of the following would result in an increase in kinetic energy?

• Boiling
• Deposition
• Freezing
• Condensing

Tags

NGSS.MS-PS1-4

Which of these is an example of an element?

• Salt
• Gold
• Brass
• Water

Which of these is an example of a compound?

• Mercury
• Steel
• Water
• Air

Tags

NGSS.MS-PS1-1

Which of these is an example of a mixture?

• Vinegar (acetic acid)
• Tin
• Sucrose (sugar)
• Air

What was the first subatomic particle discovered?

• Electrons
• Protons
• Neutrons
• Megatrons

Whose atomic model first included a nucleus?

• Dalton
• Bohr
• Rutherford
• Democritus

Tags

NGSS.HS-PS1-8

If neutral Na has 11 protons and 11 electrons, how many electrons can be found in Na⁺¹?

• 11
• 23
• 22
• 10