Question detail
What distinguishes an atom from an ion?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
Atomic structure
Question
- A. An atom is neutral, while an ion has a charge due to electron loss or gain.
- B. An atom contains only protons, while an ion contains protons and neutrons.
- C. An atom is always larger than an ion.
- D. An atom can only exist in a solid state, while an ion can exist in any state.
Answer
An atom is neutral, while an ion has a charge due to electron loss or gain.
Explanation
An atom is defined as a neutral particle consisting of protons and electrons, while an ion is an atom that has gained or lost electrons, resulting in a net charge. This key difference is crucial when discussing chemical reactions, as ions often participate in ionic bonding due to their charge, whereas neutral atoms do not.
Common mistake
Confusing Atoms and Ions
Students often confuse atoms with ions, thinking they are the same because both are particles.
An atom is a neutral particle with equal numbers of protons and electrons, while an ion is a charged particle formed when an atom gains or loses electrons. To differentiate, remember that ions have a net charge, while atoms do not. Use examples: Na (sodium atom) has no charge, while Na⁺ (sodium ion) has lost one electron and carries a positive charge.
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