Chemical formulas

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This site aims to help you find out information on the chemical formula of many common chemicals and household substances. Chemical symbols from the periodic table are used for the individual elements. eg. H for hydrogen, O for oxygen and N for nitrogen. These symbols are used to construct the chemical formula of a substance. Eg. water, H2O and ammonia, NH3

 

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Common chemical symbols of the first 20 elements. Test yourself

Common chemical formula of compounds. Test yourself

More formulas. Open and click on a compound to finds its formula. See if you are correct.

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Formula Table
Na+
K+
Mg2+
Ca2+
Al3+
 
NaCl
sodium chloride
KCl
potassium chloride
MgCl2
magnesium chloride
CaCl2
calcium chloride
AlCl3
aluminum chloride
Cl-
Na2O
sodium oxide
K2O
potassium oxide
MgO
magnesium oxide
CaO
calcium oxide
Al2O3
aluminum oxide
O2-
NaNO3
sodium nitrate
KNO3
potassium nitrate
Mg(NO3)2
magnesium nitrate
Ca(NO3)2
calcium nitrate
Al(NO3)3
aluminium nitrate
NO3-
Na2SO4
sodium sulfate
K2SO4
potassium sulfate
MgSO4
magnesium sulfate
CaSO4
calcium sulfate
Al2(SO4)3
aluminum sulfate
SO42-
Na3PO4
sodium phosphate
K3PO4
potassium phosphate
Mg3(PO4)2
magnesium phosphate
Ca3(PO4)2
calcium phosphate
AlPO4
aluminum phosphate
PO43-
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