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Question
Write the names, symbols and electronic configuration of the elements having atomic numbers 89-93.
Very Short Answer
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Solution
| Element | Symbol | Atomic number | Outer electronic configuration |
| Actinium | Ac | 89 | 5f0 6d1 7s2 |
| Thorium | Th | 90 | 5f0 6d2 7s2 |
| Protactinium | Pa | 91 | 5f2 6d1 7s2 |
| Uranium | U | 92 | 5f3 6d1 7s2 |
| Neptunium | Np | 93 | 5f4 6d1 7s2 |
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