66th B.P.S.C. (Pre) 2020
The number of neutrons in the nucleus of plutonium nuclide ($_{94}Pu^{242}$) is :
a94
b148✓ Correct
c242
d336
eNone of the above / More than one of the above
Explanation
Join logo (377) ## Page 26 Mass number = 242; Atomic number = 94 = number of protons; Number of neutrons = Mass number − Number of protons = 242 − 94 = 148
general-science