Railway Science (Chemistry-Structure of Atom) (Part-III)

Total Questions: 41

41. There are 15 protons and 22 neutrons in the nucleus of an element. What is its mass number? [RRB ALP Tier - I (31/08/2018) Afternoon]

Correct Answer: (a) 37
Solution:

Given: No. of proton = 15, No. of Neutron = 22
Mass Number = Number of Proton + Number of Neutron
15 + 22 = 37.