Question

the most stable ion formed by aluminium, a member of 3a family, is _____.
a -1
b -3
c +3
d +1

Explanation:

Aluminum is in group 3A (13) of the periodic table, meaning it has 3 valence electrons. To achieve a stable noble gas electron configuration, it loses these 3 valence electrons, forming an ion with a +3 charge.

Answer:

c. +3