Question

Which of the following would be diamagnetic:
a) Cu2+
b) Ni2+
c) Zn
d) Fe2+

Answer 1

Answer:

Nickel 2+ ion will be diamagnetic.

Explanation:

Diamagntic ion can be said that it doesn't have a free electron Or all the electrons are paired. So when analysing the given options only nickel ion has all electrons paired having configuration as

1s2 2s2 2p6 3s2 3p6 4s0 3d8.

Answer 2

Answer:

Zn will be diamagnetic

Explanation:

Zn will be diamagnetic.

No unmatched electrons are present. Diamagnetic. Zn has the external electronic configuration d10 s2. In Zn 2, the configuration becomes d10, which has always paired electrons, indeed in the presence of any detergent, making it diamagnetic. All other options are paramagnetic as they've unmatched electrons.

#spj3