Which is Characteristic of an Ion

Question

Which is characteristic of an ion?
A)Contains an unequal number of electrons and protons
B)Contains a different number of neutrons
C)Contains extra protons
D)Contains equal numbers of protons,electrons,and neutrons

Accepted Answer

Ions are atoms or molecules that have gained or lost one or more of their valence electrons, giving them a net positive or negative charge, which means they contain an unequal number of electrons and protons.