Question

Which of the following ions has a pseudo-noble-gas electron configuration?

A) Ni+

B) Fe2+

C) Cu+

D) Mn2+

Answer 1

Answer:A pseudo-noble gas configuration is: 1s2 2s2 2p6 3s2 3p6 3d10. Cu^+ has this electron configuration.  The answer is C)

Explanation:

Answer 2

Answer:

$\bold{Cu^+}$ ions have a "pseudo-noble-gas" electron configuration.

Explanation:

The ion with the $(n-1) d^{10}$ electron configuration is known as Nobel gas. The nature of noble gas is that the cations in this electron configuration are stable.

The Pseudo-noble gas has the electron configuration as:

$1s^2 2s^2 2p^6 3s^2 3p^6 3d^{10}$

Since, $Cu^+$ ion has the same configuration. The example of Nobel gas is, both $InCl$ and $InCl_3$ are stable compounds. To form $In^+$ only the $5p^1$ electron is removed leaving the $[Kr] 5s^2 4d^{10}$ electronic configuration.