Chemistry Unit Pretest

What is matter?

• Anything that has mass and occupies space

• Anything that is weightless

• Only liquids and gases

• Only solids

In a gaseous state, molecules of a substances are __________.

• close together

• spaced far apart

• have a definite shape

• have a definite volume

What is the charge of the nucleus in an atom?

• Positive

• Negative

• Neutral

• Variable

Which of the following is an example of a cation?

• Na+

• Cl-

• O₂

• CO₂

On the pH scale, a base is ____________ on the scale.

• 0 - 6

• 6 - 7

• 8 - 14

• All of the choices

This type of bond is created from a positive ion and a negative ion that are attracted to each other and take each others electrons.

• Covalent bond

• Hydrogen bond

• Ionic bond

• Polar covalent bond

C₆H₁₂O₆ is an example of a _____________. (Choose all the apply)

• element

• compound

• anion

• molecule

O₂ is an example of a ______________?

• element

• molecule

• compound

• cation

Which element has an atomic mass of 16?

• Oxygen

• Carbon

• Nitrogen

• Hydrogen

A neutral substance has a pH of ____.

• 1

• 6

• 7

• 14