Question

What is the number of valence electrons in aluminum?

Answer 1

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+)`..........

Answer 2

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