Elements in the same group (column)

Water is not found on the periodic table because water is

Which substance is a compound?

Which substances are elements?

All matter is made up of

Which is only a physical change?

All the atoms that make up an element are

How many atoms of hydrogen are in two water molcules (remember water is H20)

What is a sign of a chemical reaction occuring?

What speeds up a chemical reaction?

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