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Which of the following represents isotopes of the same element?

medium Q14 of 15
General Science - Physics (Basics)
Which of the following represents isotopes of the same element?
A₁H¹ and ₂He⁴
B₆C¹² and ₇N¹⁴
C₆C¹⁴ and ₇N¹⁴
D₆C¹² and ₆C¹⁴
Step-by-Step Solution
  1. Step 1: Understand isotopes

    Isotopes have the same atomic number but different mass numbers.
  2. Step 2: Analyze options

    ₆C¹² and ₆C¹⁴ have atomic number 6 but different mass numbers (12 and 14), so they are isotopes.
  3. Final Answer:

    ₆C¹² and ₆C¹⁴ → Option D
  4. Quick Check:

    Isotopes = Same atomic number, different mass number ✅
Quick Trick: Isotopes differ in neutrons, not protons.
Common Mistakes:
MISTAKES
  • Confusing isotopes with isobars or different elements.
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