HELPP A monatomic ion always have one unit of charge. (+1 or -1) on the species

true or false

No, this is invalid. The term mono in front of monoatomic simply refers to the number of atoms that are present in a compound or simply by itself it has no relationship with respect to the overall charge of the compound.

Explanation:

For instance Ca is considered as a monoatomic ion but it has a charge of +2.

i think its 100.

hope this !