A) 1, 2 or 3
B) 8, 9 or 10
C) 10, 20 or 30
D) 4, 5, 6 or 7
Correct Answer: D
Solution :
Non-metals generally contain 4,5,6,7 or 8 electrons in their outermost orbit or shell.(i) Carbon 2, 4 |
(ii) Nitrogen 2, 5 |
(iii) Oxygen 2, 6 |
(iv) Fluorine 2, 7 |
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