MCQOPTIONS
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| 1. |
After the emission of one \[\alpha \]-particle followed by one \[\beta -\]particle from the atom of \[_{92}{{X}^{238}}\], the number of neutrons in the atom will be [CBSE PMT 1995] |
| A. | 142 |
| B. | 146 |
| C. | 144 |
| D. | 143 |
| Answer» E. | |