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What happens when an atom gains an electron?
A. It becomes a positive ion
B. It becomes a negative ion
C. It has an increase in the number of neutrons,
D. It has an increase in the number of peptons.
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Answer:

Unlike protons, electrons can move from atom to atom. If an atom has an equal number of protons and electrons, its net charge is 0. If it gains an extra electron, it becomes negatively charged and is known as an anion. If it loses an electron, it becomes positively charged and is known as a cation.

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