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)

Step-by-step explanation:

Answer 2

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

Step-by-step 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.