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In ion formation, if an atom loses an electron, it becomes a(n):
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4. Atoms and Elements
Ions (Simplified)
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A neutral atom becomes a positive ion when it:
A
gains one or more electrons
B
loses one or more electrons
C
loses one or more neutrons
D
gains one or more protons
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Understand the concept of ions: Ions are atoms or molecules that have a net electric charge due to the loss or gain of electrons.
Recall that electrons carry a negative charge, so gaining electrons makes an atom negatively charged (a negative ion or anion).
Recognize that losing electrons removes negative charge, resulting in a net positive charge, thus forming a positive ion (cation).
Note that changes in neutrons or protons affect the atom's mass or identity but do not directly cause the atom to become an ion.
Therefore, a neutral atom becomes a positive ion specifically when it loses one or more electrons.
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