Question

Based on figure 2-2, how many electrons does an atom of Aluminum contain? (assume all atoms are neutral)

Answer 1

see exp.

Step-by-step explanation:

Aluminum has 13 electrons in a neutral atom. The 1S2, 2S2 and 2P6 shells are full, and so is the 3S2. The 3P1 shell has one electron in it (in Al's neutral atom) and that gives aluminum one lone valence electron and two "semi-valence" electrons which can be loaned out. :D

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