For example :
Magnesium + Sulphur = Magnesium Sulphur
· Also in a compound the elements are always combined in a fixed ratio.
· To separate the elements from the compound, chemical process is required as it cannot be separated manually anymore.
Interpretation of Chemical Formula
Every symbol begins with a capital letter and some have a second lower case letter.
Example: Sulphur has a symbol S, Magnesium has a symbol Mg.
The chemical formula of compounds tell us about the number of present atoms of that element in the compound.
Changing the number on the right hand side of an element in a compound, changes its name and chemical nature too.
Example : MgS is the formula for Magnesium Sulphide and there is no number to the right of Magnesium which means it has one atom. Na₂SO₄ is the formula for Sodium Sulphate. 2 is written on the right hand side of Sodium which means Sodium has has 2 atoms per compound. There is nothing written on the right hand side of Sulphate which means sulphate is present as a single entity.
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