Question

An unknown element (Y) is a nonmetal and has a valence electron configuration of ns²np4. (i) How many valence electrons does this element have? (ii) What is the formula of the compound this element would form with potassium? (iii) Would this element have a larger or smaller radius than barium? (iv) Would this element have a greater or smaller ionization energy than fluorine?

Answer 1

1. It has 6 valent electrons 2 (6-4)

2.$K_2Y$

3. It radius is smaller then barium4.

4. It has smaller ionization energy then fluorine