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

Question

Rh

Si
3.Hg

Hf?

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Answer 1 · 2016-09-02T02:50:14

Here's what I get.

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

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

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

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