What is the relationship between the elements in the same group and number of valence electrons?
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valency of an element is same as the number of its valence electrons if this number is four less than four. on the hand when an element has four or more valence electrons
the of electrons by which the octect is short of completion .
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for example, in group 1 the atom loses one electron thus the valency is one. Which means, the number of electrons the atom loses is also the valency of the atom
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