An element has X valence electrons in its outer most orbit, its valency may be?
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valance electrons must be equal. So the products of the negative element and its charges and the positive element and its charge must be equal.
C1×N1 = C2×N2
If we have a 3 valance electrons , the 'A' charge will be either +3 or -5 for a full octet and valance electron in 'B' atoms will mostly result in acquisition of additional electrons (2) for an octet and relative charge of -2.
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because it is a noble gas
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