MCQOPTIONS
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| 1. |
In which of the following systems will the radius of the first orbit \[(n=1)\] be minimum [Kerala PET 2002; CBSE PMT 2003] |
| A. | Single ionized helium |
| B. | Deuterium atom |
| C. | Hydrogen atom |
| D. | Doubly ionized lithium |
| Answer» E. | |