What is true about a positively charged ion?

It is formed when an atom loses electrons.

It is usually a nonmetallic element.

It has more electrons than protons.

It is formed when an atom gains protons.

The answer to your question is:

Explanation:

Ion is an atom that carries out a positive or a negative charge.

It is formed when an atom loses electrons. Yes, when an atom loses electrons then is formed a positive ion.

It is usually a nonmetallic element. Incorrect. Ions can be form by metallic or non metallic ions.

It has more electrons than protons. Yes, when an atom gains electrons is formed a negative ion.

It is formed when an atom gains protons. I think is incorrect, ions are formed when they gain or lose electrons not protons.