Which of the Following is Not a Cation

Question

Which of the following is not a cation?
A) Na+
B) Cl-
C) K+
D) Ca2+
E) Mg2+

Accepted Answer

A cation is a positively charged ion, which means it has lost one or more electrons. Na+, K+, Ca2+ and Mg2+ are all cations because they have lost one, two or three electrons, respectively. However, Cl- is an anion because it has gained an electron, giving it a negative charge.