Question

Which of the following elements will tend to form an anion?

A. Aluminum
B. Beryllium
C. Copper
D. Silicon
E. All of the Above

Answer 1

Metals usually form cations because they like to lose electrons to get a full octet.
Nonmetals usually form anions because they like to gain electrons to get a full octet.

Aluminum will lose 3 electrons to form a cation
Beryllium will lose 2 electrons to form a cation
Copper can lose either 1 or 2 electrons to form a cation.
Silicon can gain 4 electrons to form an anion.

Your correct answer is silicon.