Question

An atom of selenium (Se) forms a monatomic ion. Which of the following ions does is most likely form?

Answer 1

Answer:

• The correct answer is Se^2-

Explanation:

• The elements of group VI-A are
• O, S, Se and Te.
• -2 is most likely form in groups VI-A elemenst like O^2- as well as S^2-. Similarly Se also have Se^2-.

Reason:

• Actually these elements have 6 valence shell electrons and they want to get 2 more electrons in order to get nearest configuration of noble gases.

Answer 2

Selenium being in the same column of the periodic table, 'family', as oxygen which form oxide 0^2- and sulfur which forms sulfide S^-2.