Question

when an atom that has no charge loses two electrons, it becomes a
positive ion.
negative ion.
positive isotope.
negative isotope.

Explanation:

An atom with no charge (neutral) has equal protons (positive charge) and electrons (negative charge). When it loses two electrons, the number of protons (positive) becomes greater than electrons (negative), so the atom acquires a positive charge. Ions are charged atoms; isotopes are variants of an element with different neutrons, not related to electron loss/gain here. Losing electrons (negative charges) makes it a positive ion.

Answer:

A. positive ion