Question

Among groups 14 and 15, the elements of which group are less metallic?

Answer 1

1. Elements of group 15 are less metallic than those of group 14.
2. This is because group 15 elements have higher nuclear charges and smaller atomic radii.
3. They hold their valence electrons more strongly, so they lose electrons less easily.
4. Hence, their ionisation energies are higher, and they show less metallic character.
5. Metallic character increases down group 15 due to increasing atomic size and decreasing ionisation energy.