Foundation
Chemistry Foundation
Nuclear Chemistry
Question
If 92X238 liberates an š°-particle then the number of neutrons present in daughter nuclei is -
Know your College Admission Chances Based on your Rank/Percentile, Category and Home State.
Get your JEE Main Personalised Report with Top Predicted Colleges in JoSA
Solution
When an alpha particle is emitted the mass number of the atom decreases by 4 units and atomic number decreases by 2 units.
So, 
Number of neutrons in Y = 234 – 90 = 144