Unit 1 Chemistry Test 8th

Compounds & mixtures are...

• made up of 2 or more substances

• made of 1 substance

• chemically combined

• pure substances

What are made of 2 or more substances?

• compounds

• mixtures

• elements

• atoms

What does the 9 stand for in the element box?

• atomic number

• atomic mass

• symbol

• element name

The atomic number tells us the number of:

• protons & electrons

• protons & neutrons

• neutrons & electrons

• protons

How do you find the number of protons?

• look at the atomic number

• look at the atomic mass

• subtract the atomic number from the mass

What two things added together equals the atomic mass?

• protons + neutrons

• protons + electrons

• electrons + neutrons

What does APE stand for?

• atomic number = protons = electrons

• atomic number - protons = electrons

• atomic number +1 = protons +2 = electrons +3

Mixtures are...

• chemically combined

• physically combined

• pure substances

• can see the different parts

Compounds are...

• chemically combined

• physically combined

• pure substances

• can see the different parts

What are physically combined and you can see the different parts?

• mixtures

• compounds

• atoms

• molecules