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<!-- EDIT BELOW THIS LINE Main Difference between Valency And Valence ElectronsItalic text

What is Valency ? Valency is the combining capacity of an element. It can also be said as the number of valence electrons required for forming a chemical bond. Ex. Valency of Oxygen is 2 because it needs to electrons to complete its outermost shell or to attain the electronic configuration of the nearest Nobel gas. In periodic table, the valency of elements of the same group remains the same. But the valency goes on increasing from 1 to 4 and then decreases from 4 to 0 as we go from left to right in period.

What is valence electrons ? Valence electrons is the number of electrons present in the outermost shell. Ex.The Valence Electrons of Oxygen is 6 because it has 6 electrons in the outermost shell.

Difference Valency of an element can be determined by the number of valence electrons. But it is not the same.