Basic chemistry

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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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Periodic table grid

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Common chemical symbols of the first 20 elements. Test yourself

Common compound grid

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Common chemical formula of compounds. Test yourself

Formula grid 2

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

Formula grid

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Click on the compound link to show or hide each formula.

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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