A) 40, 72
B) 20, 36
C) 10, 28
D) 11, 12
Correct Answer: A
Solution :
[a] \[Zr\left( 40 \right),\text{ }Hf\left( 72 \right)\] have similar properties as they belong to same group and have same valence shell electronic configuration.You need to login to perform this action.
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