Which of the following is likely to form ions two units lower in charge than expected from the group number?
A) Hg
B) Cd
C) Sb
D) Ge
E) Zn

Question

Quizplus · Accepted Answer

Sb (antimony) is a metalloid in group 15, but can form ions that are two units lower in charge than expected (Sb3+ instead of Sb5+). This is due to the fact that Sb has a relatively low ionization energy and electronegativity, making it easier for it to lose electrons and form a +3 ion rather than a +5 ion. Hg, Cd, Ge, and Zn are not known to form ions two units lower in charge than expected based on their group number.

Which of the Following Is Likely to Form Ions Two