Chemistry
| Z | Element | No. of electrons/shell |
|---|---|---|
| 27 | cobalt | 2, 8, 15, 2 |
| 45 | rhodium | 2, 8, 18, 16, 1 |
| 77 | iridium | 2, 8, 18, 32, 15, 2 |
| 109 | meitnerium | 2, 8, 18, 32, 32, 15, 2 |
Meitnerium has not been isolated in pure form, and its properties have not been conclusively observed; only cobalt, rhodium, and iridium have had their properties experimentally confirmed. All three elements are typical silvery-white transition metals, hard, and have high melting and boiling points.
Read more about this topic: Group 9 Element
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—Ralph Waldo Emerson (1803–1882)
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—Henry David Thoreau (1817–1862)
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—Ellen Henrietta Swallow Richards (1842–1911)