Question

5) An element X' has atomic size 1.55 A while an element Y has
atomic size 0.66A. State why X' is considered metallic and Y non-
metallic​

Answer 1

Answer:

The answer is all based on Nuclear Charge

Explanation:

Because metals have more atomic size than that of non metals as there is not much nuclear pull on the valence electrons while in the case of non metals there are more than 4 electrons in there outermost shell which causes high nuclear pull to the valence electrons