how to find valancy from valance electrons
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The valence electrons of an atom determine the valency of that element. If the atom has less than 4 electrons in its outermost shell then the atom will loose them and will gain plus (+) charge and will become positively charged ion called cation. If 1 electron is lost then +1 charge If 2 electrons are lost then+2 charge
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Method to find Valency
Octet rule: According to the octet rule, a compound is said to be stable when the outermost shell of the compound is having eight electrons. ...
Periodic table: Periodic table consists of elements that are arranged in such a way that, the valency of a given element can be determined.
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