A) 1, 2 or 3
B) 7, 8 or 9
C) 10, 11 or 12
D) 20, 30 or 40
Correct Answer: A
Solution :
Metals generally have 1, 2 or 3 electrons in their outermost orbit or valence shell. e.g.,(i) Sodium - (Na) - 2, 8, 1 |
(ii) Magnesium (Mg) - 2, 8, 2 |
(iii) Aluminium - (Al) - 2, 8, 3. |
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