Question

what symbol would be included in the noble gas notation for an element that had valence electrons in the 5s sub shell

Answer 1

Answer:

The answer is Kr (Krypton).

This is because krypton has an electronic configuration of:

1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6

Taking note of the sequence of electronic configuration:

1s, 2s, 2p, 3s, 3p, 4s, 3d, 4p, 5s

It can be seen that Kyrpton's electronic configuration finishes just before the 5s subshell. Therefore, the noble gas notation for an element with valence electrons in the 5s subshell can use [Kr] as a shortcut to denote its electronic configuration. For example:

If an element has 1 valence electron in the 5s subshell, the noble gas notation will be:

[Kr] 5s1

Explanation: