Which process leads to the formation of an anion from a neutral atom?

• A. The atom loses one or more electrons.
• B. The atom loses one or more neutrons.
• C. The atom gains one or more protons.
• D. The atom gains one or more electrons.

Answer: (D)

Verified step by step guidance

1. Understand that an anion is a negatively charged ion formed when a neutral atom gains extra electrons.
2. Recall that electrons carry a negative charge, so gaining electrons increases the negative charge of the atom.
3. Recognize that losing electrons would result in a positive ion (cation), not an anion.
4. Note that changes in protons or neutrons alter the element or isotope, not the ion charge directly.
5. Conclude that the process leading to an anion formation is the atom gaining one or more electrons.