Unit 1 Chemistry Review

Which of the following is described as the basic unit of matter?

• Element
• Atom
• Molecule
• Compound

The process of water changing states by boiling is an example of a

• Chemical change

• Physical change

Which of the following are examples of a chemical change?

• Formation of a percipitate

• Change in shape

• Change in state

• Gas production

What are examples of qualitative data?

• Pressure

• Shape

• Odor

• Color

A change in temperature and color of a substance during a science experiment means that what took place?

• Physical Change

• Chemical Change

When a gas is produced during a science experiment, which occurred?

• Physical change
• Chemical reaction

An element

• is made up of 2 or more different atoms

• is made up of only one type of atom

• cannot be chemically combined with other elements

• cannot be physically combined with other elements

Examples of elements are (chose all that apply)

• hydrogen (H)

• sodium chloride (NaCl)

• carbon (C)

• water (H₂O)

These are 2 or more substances that are not chemically bonded together.

• mixtures

• compounds

• elements

• molecules

This is a particle made up of 2 or more atoms held together by one or more chemical bonds. Ex: H₂O or KSO₄

• element

• molecule

• atom

• mixture