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What is the difference between Co and CO?

• CO is an element but Co is a compound

• Nothing is different. They are the same thing.

• CO is two elements and Co is only one element

• Co is not a pure substance

Which is the best description of an element?

• A substance that cannot be broken down into simpler substances

• A collection of atoms that have different abilities when joined together

• A man-made mineral

• A mixture of substances

Which one is a compound?

• Ni

• F

• Re

• NaCl

How many different elements are in the compound?

• 12

• 3

• 24

• 6

The place where known elements are represented...

• The Period Table

• Compounds

• Chemical Formula

• Graph

A substance that consists of 2 or more different elements is a

• element

• data table

• symbol

• compound

One way to tell how many elements a compound has is to..

• the the square root of the total number of lettersThis is a wrong answer the the square root of the total number of letters

• count the capital letters

• add up all the numbers

• count the letters

How many Chlorine are in MgCl₂?

• 2
• 1
• 3

How many Aluminum are in Al₂O₃?

• 3
• 2
• 5

What is H₂SO₄ 
 made up of?

• 2 hydrogen, 1 sulfur, 4 oxygen
• 1 hydrogen, 2 sulfur, 4 oxygen
• 2 hydrogen & 4 sodium
• 1 hydrogen & 6 sodium