Q. 115.0( 4 Votes )
Name the elements water is made of. What are the valencies of these elements? Work out the chemical formula for water.
Water(H2O) is made up of two types of elements known as hydrogen and oxygen.
The valency of hydrogen is 1 as only one valence electron is present in its outermost shell and one is needed. The valency of oxygen is 2 as six valence electrons are present in its outermost shell and two are needed.
So according to the valencies of both the elements present in water, the formula becomes H2O.
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