Question
Which pair of elements with the given atomic numbers is expected to have similar properties?
✓
Answer
a
$Zr\,(40),\,Hf\,(72)$ have similar properties as they belong to same group and have same valence shell electronic configuration
$Zr\,(40),\,Hf\,(72)$ have similar properties as they belong to same group and have same valence shell electronic configuration
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