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Which of the following pairs is/are correctly matched? 1. Isotopes: Atoms with same atomic number but different atomic mass 2. Isobars : Atoms with same number of neutrons but different atomic number 3. Isotones: Atoms with same mass number but different atomic number Select the correct answer using the code given below:

Options

  1. A1,2 and 3
  2. B1 only
  3. C1 and 2 only
  4. D2 only

Correct answer

B. 1 only

Step-by-step solution

The correct answer is option B.

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