What do we call a negatively charged atomic particle?

Question

BlackTom AI · Accepted Answer

In this question, we’re asked to identify the term for a negatively charged atomic particle. 
Option 1: allotrope. An allotrope refers to different structural forms of the same element (like carbon in graphite and diamond), not to electrical charge. This makes it irrelevant to the charge question. 
Option 2: isotope. An isotope is a variant of an element that has the same number of protons but a different number of neutrons; charge may vary slightly due to isotopic composition, but the term specifically describes neutron count differences, not charge state. Therefore this is not the correct term for a negatively charged particle. 
Option 3: cation. A cation is a positively charged ion formed when an atom loses electrons. Since the question asks for a negatively charged particle, this option is incorrect because it denotes the opposite charge. 
Option 4: anion. An anion is a negatively charged ion formed when an atom gains electrons. This directly matches the description of a negatively charged atomic particle, making it the correct choice.

CHEM 110 Section 3 (PM) SP25 Pre-Lecture 2 Quiz C01-1-3

What do we call a negatively charged atomic particle?

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