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Element is strongly electropositive and Y is strongly electronegative. Both element are univalent, the compounds formed from their combination will be:
(1) X+ Y-
(2) X- Y+
(3) X-y
(4) X → y
Ans: X+ Y-
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
merits
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