MCQOPTIONS
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MCQOPTIONS
| 1. |
An element with atomic number 84 and mass number 218 loses one \[\alpha \]-particle and two \[\beta \]-particles in three successive stages, the resulting element will have [NCERT 1979; CPMT 1990] |
| A. | At. no. 84 and mass number 214 |
| B. | At. no. 82 and mass number 214 |
| C. | At. no. 84 and mass number 218 |
| D. | At. no. 82 and mass number 218 |
| Answer» B. At. no. 82 and mass number 214 | |