Question

which of the following complexes is an outer orbital complex
1.[cr(H20)6]4-
2.[mn(cn)6]4-
3.[co(nh3)6]3+
4.[ni(nh3)6]2+​

Answer 1

Answer:

3 [co(nh3)6]3+

Explanation:

Because the outer orbitlal only contain 6+3 = 8 electrons