Question

How many unpaired electrons are there in the electronic structure for ${Cu}^{+}$ ion?

• A. $1$
• B. $3$
• C. $5$
• D. none of these

Answer 1

The correct option is D none of these

The atomic number of $Cu$ is $29$ and it forms ${Cu}^{+}$ ion by the loss of one electron. ${Cu}^{2+}(Z=28):\left[Ar\right]{3d}^{10}{4s}^0$. Hence, ${Cu}^{+}$ ion has no unpaired electron.