Question

Periodic table subshell electronic configuration

Answer 1

Answer:

Within each column, each element has the same valence electron configuration—for example, ns1 (group 1) or ns2np1 (group 13). ... 1: The Periodic Table, Showing How the Elements Are Grouped According to the Kind of Subshell (s, p, d, f) Being Filled with Electrons in the Valence Shell of Each Element

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Answer 2

Answer:

Let's take example of oxygen to do this problem

Z = 8

Number of atoms in each cells = 2n² ( By Bohr - burry plan )

K shell = 2× 1² = 2

L shell = 2× 2² = 8

So to make it Valence we need 2 more electrons

But now I am not gonna Valence

So, skeleton configuration

K shell = 2

L shell = 6

This means that the lowest energy configuration of oxygen, with 8 electrons, has two electrons in the n=1 s-subshell, two in the n=2 s-subshell, and four in the n=2 p-subshell.

So subshell configuration of oxygen is ----

1s2 2s2 2p4

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