What is the number of valence electrons in aluminum?

2 Answers
anor277
Jul 15, 2017

For aluminum, #Z=13#.......and there is a neon core of electrons.......

Explanation:

We describe the electronic configuration as #1s^(2)2s^(2)2p^(6)3s^(2)3p^1#. The valence electrons all have principle quantum number 3, so you tell us the number........

As a consequence most of the chemistry of aluminum deals with #Al^(3+)#..........

David Drayer
Jul 15, 2017

The number of valance electrons is 3

Explanation:

The electron configuration for Aluminum is

# 1s^2 2s^2 2p^6 3s^2 3 p^1#

The first 10 electrons are in the filled first and second shells.

This leaves only three electrons in the third shell # 3s^2 3p^1#

# 13 -10 = 3 #

so there are only 3 valance electrons

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