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| 1. |
Time period of revolution of electron in the second orbit of singly ionised helium atom isaboutOptions:2 10-9 S2.5 x 10310 s4.2 x 10-14-16-12 |
| Answer» Time period of revolution of electron in the second orbit of singly ionised helium atom isaboutOptions:2 10-9 S2.5 x 10310 s4.2 x 10-14-16-12 | |