Question

3 multiple choice 1 point how many valence electrons does aluminum (al) have? 2 1 5 4 6 0 3 7

Explanation:

Step1: Recall aluminum's electron - configuration

Aluminum has an atomic number of 13. Its electron - configuration is 1s²2s²2p⁶3s²3p¹.

Step2: Determine valence electrons

Valence electrons are in the outermost shell. For aluminum, the outermost shell is the third shell (n = 3), and it has 2 + 1=3 electrons.

Answer:

3