Consider the electron configuration of the ion to determine which ion shown below has an incorrect ionic charge?
A.Se2-
B.Ba2+
C.Al3-
D.Rb+
E.none of the above

Question

Consider the electron configuration of the ion to determine which ion shown below has an incorrect ionic charge?
A.Se2- 	
B.Ba2+ 	
C.Al3- 	
D.Rb+ 	
E.none of the above

vshiroky · Answer

I think E @iPwnBunnies

ipwnbunnies · Answer

Incorrect. Aluminum is a metal, and it has an ion charge of 3+, not 3-

vshiroky · Answer

I originally thought A, but thought that was incorrect

ipwnbunnies · Answer

Se2- is the correct charge. Look at the periodic table, it can show us the ion charges of main group elements. For the nonmetals, the ion charge is negative and the number is how many groups away it is from the noble gases.

ipwnbunnies · Answer

Se is a 6A element, which is 2 groups away from the noble gases, group 8A. So, I know Se has an ion charge of 2- in ionic bonding..

vshiroky · Answer

C.

ipwnbunnies · Answer

Right, C is the correct answer for this question.