An atom of selenium (Se) forms a monatomic ion. Which of the following ions does is most likely form?
Possible answer choices:
Se^2+
Se^6-
Se^6+
Se^2- My answer. I wish to learn and understand. That being said I will post 'why' I think this answer is correct, when the thread becomes active.

Question

An atom of selenium (Se) forms a monatomic ion. Which of the following ions does is most likely form?
Possible answer choices:
Se^2+
Se^6-
Se^6+
Se^2- My answer. I wish to learn and understand. That being said I will post 'why' I think this answer is correct, when the thread becomes active.

yoongilife · Answer

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.

sweetburger · Answer

Your reasoning is sound. If Selenium was going to form a monatomic ion it would indeed most likely form the -2 anion of Se^2-.