Question

if an element forms a 2+ ion, in which group of the periodic table would you expect to find it?

a. 1
b. 18
c. 17
d. 2

Explanation:

Elements in group 2 (alkaline earth metals) have 2 valence electrons. They tend to lose these 2 electrons to form \(2+\) ions. Group 1 elements form \(1+\) ions. Group 17 elements (halogens) tend to gain 1 electron to form \(1-\) ions. Group 18 elements (noble gases) are generally inert and do not form ions easily.

Answer:

D. 2