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The number of d electrons in Fe+2 (atomic number of Fe= 26 ) is not equal to that of the:
(1) p-electrons in Ne (At. No.= 10)
(2) s-electrons in (At. No.= 12)
(3) d -electrons in Fe
(4) p-electrons in Cl- (At. No. of = 17)
Ans: p-electrons in Cl- (At. No. of = 17)
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An element has the electronic configuration 1s 2 , 2s 2, 2p 6 , 3s 2 , 3p 2 . Its valency electrons are: (1) 6 (2) 2 (3) 3 (4)4 Ans: 4
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