chemical formulae

What is the atomic symbol for Iron?

• Fe

• I

• Ir

• Rn

What does a chemical formula represent?

• A set of chemical symbols showing the elements present in a compound or molecule

• The total mass of all atoms in a compound

• The number of protons and neutrons in an atom

• The physical state of a substance

How many oxygen atoms are present in one molecule of H2O?

• 1

• 2

• 3

• 0

What is the name of the compound with the chemical formula Na2CO3?

• Sodium Sulfate

• Sodium Carbonate

• Sodium Nitrate

• Sodium Hydroxide