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| 1. |
Write the electronic configuration of the elements with the atomic number `61,91,101` and `109`. |
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Answer» `Z=61` (promethium, Pm) `=4f^(5)5d^(0)6s^(2)` `Z=91` (Protactium Pa) `=5f^(2)6d^(1)7s^(2)` `Z=101` (Mendelevium Md) `=5f^(13)6d^(0)7s^(2)` `Z=109` (Meitnerium Mt) `=5f^(14)6d^(7)7s^(2)` |
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