Practice counting atoms:

How many atoms do you see in the following chemical formulas?

                               

 

 

AlBr3           = ______ atoms of aluminum and _____ atoms of bromine

 

Mg(OH)2     = ______ atoms of magnesium, _____ atoms of oxygen,

and ____ atoms of hydrogen

 

3CaCl2       = _____ atoms of calcium and ______ atoms of chlorine

 

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