Verified Solution • 2025–26 Session
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QPages 440-441: Q3: HC Verma: Concepts of Physics - Volume 2 The Nucleus Pages 440-441: Q3 Solution: As compared to atom, atom has
⚠️ Common Exam Traps & Conceptual Pitfalls
Students often think extra neutrons in an isotope mean extra electrons, but isotopes share the same atomic number. Since $Z=6$ for all carbon isotopes, the electron count stays $6$; only the neutron number changes.
As compared to atom, atom has
Multiple Choice Options
- A two extra protons and two extra electrons
- B two extra protons but no extra electrons
- C two extra neutrons and no extra electron
- D two extra neutrons and two extra electron
Step-by-Step Verified Solution
**Answer:** (c) two extra neutrons and no extra electron.
**Step-by-Step Explanation:**
Carbon-14 has 6 protons, 8 neutrons, and 6 electrons. Carbon-12 has 6 protons, 6 neutrons, and 6 electrons. So C-14 has two extra neutrons and no extra electrons.
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