Elements and Compounds

An element can be broken down into a simpler substance.

• True

• False

What is a compound?

• A compound is a pure substance made up of one kind of mixture.

• A compound is a pure substance made up of one kind of element.

• A compound is a pure substance made up of two or more elements.

Which of the following IS NOT an element ?

• Au

• Ag

• OH

• K

How many elements are in the chemical formula NaCl ?

• 1

• 3

• 2

Which of the following is an element ?

• H2O

• BaSO4

• Br

• ArGa

You can tell how many elements are in a compound by counting the .....

• how many letters are in the formula

• looking on the periodic table

• counting the capital letters

_____________ is everything around you.

• compounds

• matter

• atoms

• elements

A pure substance has

• more then 2 elements.

• can easily be broken down.

• has a definite and unchanging composition.

The smallest particle in a chemical element or compounds are ......

• molecules

• elements

• atoms

• compounds

A mixture is a combination of many different elements not chemically combined and can be ......

• not be seperated.

• easily seperated.

• combined with compounds.