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

Answer: (B)

Verified step by step guidance

1. Understand the concept of ions: Ions are atoms or molecules that have a net electric charge due to the loss or gain of electrons.
2. Recall that electrons carry a negative charge, so gaining electrons makes an atom negatively charged (a negative ion or anion).
3. Recognize that losing electrons removes negative charge, resulting in a net positive charge, thus forming a positive ion (cation).
4. 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.
5. Therefore, a neutral atom becomes a positive ion specifically when it loses one or more electrons.