MCQOPTIONS
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| 1. |
After the emission of \[\alpha \]-particle from the atom \[_{92}{{X}^{238}}\], the number of neutrons in the atom will be [MNR 1993; UPSEAT 1999, 2001, 02] |
| A. | 138 |
| B. | 140 |
| C. | 144 |
| D. | 150 |
| Answer» D. 150 | |