UPSC Chemistry Nuclear Chemistry / नाभिकीय रसायन Question Bank Atoms, Molecules and Nuclear Chemistry

Which of the following pairs is/are correctly matched? [NDA]

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:

Code:

A) 1, 2 and 3

B) 1 only

C) 1 and 2 only

D) 2 only

Correct Answer: B