Question

Two isotopes of Uranium have 92 electrons each and have 144, 148 neutrons respectively.

Mass numbers of these two isotopes will be respectively

(A)237 ,236

(B) 236 ,237

(C) 236 ,238

(D)238 ,236​

Answer 1

Answer:

none of the above

the answer will be

236 and 240

Answer 2

Answer:

(A)237 ,236

(B) 236 ,237

(C) 236 ,238

(D)238 ,236