Chemical formulae

Exercises

Complete the table below. Below are the names and the symbols of some of the elements used.

Na = sodium, Cl = chlorine, S = sulfur, O =oxygen, N =nitrogen, H = hydrogen,
Mg = magnesium, Fe = iron, Ca = calcium.

Formula
Name
How many different elements?
Name the elements
Number of atoms of each element
Total number of atoms
NaCl

Sodium chloride

(table salt)

?
?
?
?
SO2
Sulfur dioxide
2
Sulfur
Oxygen
Sulfur= 1
Oxygen=2
3
NH3
Ammonia
?
?
?
?
C6H12O6
Glucose
?
?
?
?
CaCO3

Calcium carbonate

(limestone)

?
?
?
?
MgSO4

Magnesium sulfate

(Epsom salts)

?
?
?
?
NaOH

Sodium hydroxide

(Caustic soda)

?
?
?
?
Fe2O3

Iron oxide

(rust)

?
?
?
?
NaHCO3

Sodium hydrogen carbonate

(baking soda)

?
?
?
?
CO2

Carbon dioxide

(Dry ice)

?
?
?
?
C12H22O11

Sucrose

(Table sugar)

?
?
?
?

Solution

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