MCQOPTIONS
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MCQOPTIONS
| 1. |
Pfund series are produced in the spectrum of hydrogen atom__________________? |
| A. | when electrons jump down to 2nd- orbit |
| B. | when electrons jump down to 3rd- orbit |
| C. | when electrons jump down to 4th- orbit |
| D. | when electrons jump down to 5th- orbit |
| Answer» E. | |