Respuesta :
Answer:
B).Both the duet and octet rules reveal that atoms gain or lose electrons forming ions to achieve a more stable electron configuration.
Explanation:
Duet : The outermost shell of an element has two electron.
Octet : The outermost shell of an element has eight electron
According to Lewis Theory of bonding.
He suggested that atoms forms bond either by sharing of electron pair or by complete transfer of electron from one atom to other in order to achieve the stable atomic configuration.
Noble Gas configuration (stable atomic configuration) : When the outermost shell of an atom is fully filled(8 electron) , then it get stability and don't react with other element .E.g Ne = 10 electron = 1s(2) 2s(2) 2p(6) = 8 electron
Neon is stable elements.
Consider,Sodium element (Na) it has 11 electron = 1s(2) 2s(2) 2p(6) 3s(1) , If it looses 1 electron from 3s ,then it has 8 electron left (same as Ne).
So Na show (+1) valency .
Chlorine(Cl), it has 17 electron , 1s(2) 2s(2) 2p(6) 3s(2) 3p(5) , In order to achieve stability , it gain one electron and show (-1) valency.
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