Define Valency, Molecular formula.
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VALENCY"
Valency is the combining power of an element. Elements in the same group of the periodic table have the same valency.
MOLECULAR FORMULA"
A molecular formula consists of the chemical symbols for the constituent elements followed by numeric subscripts describing the number of atoms of each element present in the molecule.
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Valency is the combining power of an element. Elements in the same group of the periodic table have the same valency. ... The noble gases have the valency 0 as they do not usually combine with other elements. To write the chemical formula for a compound it is best to use the S.V.S.D.F system.
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