# What is the electron configuration of Hg^2+?

Jun 17, 2018

Well for mercury, $Z = 80. . .$

#### Explanation:

And so for $H g$ we got 80 electrons to distribute according to the Aufbau scheme....

${\underbrace{1 {s}^{2} 2 {s}^{2} 2 {p}^{6} 3 {s}^{2} 3 {p}^{6} 3 {d}^{10} 4 {s}^{2} 4 {p}^{6} 4 {d}^{10} 5 {s}^{2} 5 {p}^{6} 4 {f}^{14} 5 {d}^{10} 6 {s}^{2}}}_{\text{configuration of mercury metal}}$

And so for $H {g}^{2 +}$ we got 78 electrons to distribute ….....

${\underbrace{{\left\{1 {s}^{2} 2 {s}^{2} 2 {p}^{6} 3 {s}^{2} 3 {p}^{6} 3 {d}^{10} 4 {s}^{2} 4 {p}^{6} 4 {d}^{10} 5 {s}^{2} 5 {p}^{6} 4 {f}^{14} 5 {d}^{10}\right\}}^{2 +}}}_{\text{configuration of mercuric ion}}$

Are there the right number of electrons? All care taken, but no responsibility admitted...