Question

why is nh3 more covalent than ash3?​

Answer 1

Answer:

This is because nitrogen has smaller size and thus higher electronegativity. Thus nitrogen finds it harder to donate or accept electrons in comparison to share out, i.e., it can form covalent bond more easier. While in case of AsH3, As has larger size due to which it's valence electrons can be donated easily . Thus As forms ionic bonds. Therefore NH3 is more covalent than AsH3.

Answer 2

Answer:

NH3 is more covalent than ash3 due to smaller size and higher electronegativity of the central atom nitrogen.ash3 due to its smaller electronegativity has more ionic character than covalent character.