Question

multiple choice question when an atom either gains or loses electrons, it is called ______.
options:
an isotope
a subatomic particle
neutral
an ion
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Explanation:

An ion is formed when an atom gains or loses electrons, resulting in a net charge. Isotopes involve neutron changes, subatomic particles are components, and neutral atoms have equal protons/electrons. So the correct term is an ion.

Answer:

an ion