physical sci review

Contains the protons and neutrons

The property that describes how readily a substance combines chemically with other substances is

is the smallest unit of a substance that keeps the keeps all of the physical and chemical properties of that substance

matter that always has exactly the same composition. 

Symbol for Gold

• Al

• G

• Au

• g

the parts of the mixture are noticeably different from one another.

is a heterogeneous mixture that separates into layers over time

• suspension

• sand

• salt water

• solution

contains some particles that are intermediate in size between the small particles in a solution and the larger particles in a suspension. 

Which of these groups of letters could be used as a symbol for an element?

• Cm

• p

• HF

• fe

5. Which of these materials is a homogeneous mixture? 

• sand

• air

• saltwater

• steel