Unit 2: 1-1B Elements & Compounds CCQ

Oxygen (O2) is best described as which of the following?

• an element

• a compound

• a mixture

AgCl is best described as which of the following?

• an element

• a compound

• a mixture

Which BEST describes the illustration?

• A pure substance made of a compound

• A pure substance made of an element

• A mixture made up of different compounds

• A mixture made up of different elements

Which BEST describes the illustration?

• A pure substance made of a compound

• A pure substance made of an element

• A mixture made up of different compounds

• A mixture made up of different elements

Which BEST describes the difference between an element and a compound? (pick the two that describes these differences)

• An element is a substance that cannot be broken down by chemical processes

• A compound is a group of molecules where there are two or more types of atoms bonded together and all the molecules are the same.

• A compound is a group of molecules where there are two or more types of atoms bonded together and all the molecules are different.

• An element is a substance that can be broken down by chemical processes