# Using only a periodic table as a guide, how do you write the condensed electron configurations for the following atoms?

## Rh Si 3.Hg Hf?

Sep 2, 2016

Here's what I get.

#### Explanation:

1. $\text{Rh" = "[Kr]} 5 s 4 {d}^{8}$
Note: This is an exception to what you would predict from th Periodic Table.

2. $\text{Si" = "[Ne]} 3 {s}^{2} 3 {p}^{2}$

3. $\text{Hg" = "[Xe]} 6 {s}^{2} 4 {f}^{14} 5 {d}^{10}$

4. $\text{Hf" = " [Xe]} 6 {s}^{2} 4 {f}^{14} 5 {d}^{2}$