Question

What is an ion?

A.
a group of two or more atoms that acts like one atom
B.
a compound that contains two elements
C.
a particle in the nucleus of an atom that has no charge
D.
an atom or particle with a positive or negative charge

Answer 1

An atom of molecule with a net electric charge due to the loss or gain of one or more electrons. 

Answer 2

The Answer is D. An Ion is an atom with a Charge, whether it be positive or negative.