# What are the symbols for the elements with the valence electron configuration: (a) s^2d^1, (b) s^2p^3 and (c) s^2p^6?

Dec 11, 2017

Here's what I get.

#### Explanation:

You can readily compare the following with the ones you see from http://ptable.com/ (by clicking the "Orbitals" tab):

(a) Valence electron configuration ${\text{s"^2"d}}^{1}$

• ${\text{Sc": "4s"^2"3d}}^{1}$
• ${\text{Y":color(white)(l) "5s"^2"4d}}^{1}$
• ${\text{La": "6s"^2"5d}}^{1}$
• ${\text{Ce": "6s"^2"4f"^1"5d}}^{1}$
• ${\text{Gd": "6s"^2"4f"^7"5d}}^{1}$
• ${\text{Lu": "6s"^2"4f"^14"5d}}^{1}$
• ${\text{Ac": "7s"^2"6d}}^{1}$
• ${\text{Pa": "7s"^2"5f"^2"6d}}^{1}$
• ${\text{U": color(white)(l)"7s"^2"5f"^3"6d}}^{1}$
• ${\text{Np": "7s"^2"5f"^4"6d}}^{1}$
• ${\text{Cm": "7s"^2"5f"^7"6d}}^{1}$

(b) Valence electron configuration ${\text{s"^2"p}}^{3}$

The pnictogens:

• ${\text{N"color(white)(l): "2s"^2"2p}}^{3}$
• ${\text{P"color(white)(l): "3s"^2"3p}}^{3}$
• ${\text{As": "4s"^2"3d"^10"4p}}^{3}$
• ${\text{Sb": "5s"^2"4d"^10"5p}}^{3}$
• ${\text{Bi": "6s"^2"4f"^14"5d"^10"6p}}^{3}$
• ${\text{Mc": "7s"^2"5f"^14"6d"^10"7p}}^{3}$

(c) Valence electron configuration ${\text{s"^2"p}}^{6}$

The noble gases:

• ${\text{Ne": "2s"^2"2p}}^{6}$
• ${\text{Ar": "3s"^2"3p}}^{6}$
• ${\text{Kr": "4s"^2"3d"^10"4p}}^{6}$
• ${\text{Xe": "5s"^2"4d"^10"5p}}^{6}$
• ${\text{Rn": "6s"^2"4f"^14"5d"^10"6p}}^{6}$
• ${\text{Og": "7s"^2"5f"^14"6d"^10"7p}}^{6}$