Q: 21 (NDA-I/2012)


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 : Code:
question_subject: 
General Knowledge
question_year: 
2012
question_exam: 
NDA-I
stats: 
0,160,312,248,160,48,16