The mineralogy of Mendelevium
About Mendelevium |
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Mendelevium is a radioactive transuranic element that has only been produced in nuclear reactors. |
General Properties | |
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Symbol: | Md |
Atomic Number: | 101 |
Standard atomic weight (Ar): | [258] |
Electron configuration: | [Rn] 5f13 7s2 |
Atomic Properties | |
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Electronegativity (Pauling scale): | 1.3 |
1st Ionization energy: | 635 kJ/mol |
Oxidation States: | 2,3 |
Physical Properties | |
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Melting Point: | 1100 K |
Metal/Non-Metal: | actinoid |
Main isotopes of Mendelevium | ||||
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Isotope | % in Nature | Half Life | Decay type | Decay product |
257Md | synthetic | 5.52h | ε | 257Fm |
α | 253Es | |||
Spontaneous fission | ||||
258Md | synthetic | 51.5d | ε | 258Fm |
260Md | synthetic | 31.8d | Spontaneous fission | |
α | 256Es | |||
ε | 260Fm | |||
β− | 260No |
Main ions of Mendelevium | ||||
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Name | Ion | Example minerals | ||
mendelevium(II) | Md2+ | |||
mendelevium(III) | Md3+ |
Other Information | |
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Year Discovered: | 1955 |
Discovered By: | |
Named For: | |
CPK color coding: | #B30DA6 |
External Links: | WikipediaWebElementsLos Alamos National LaboratoryTheodore Gray's PeriodicTable.com |
Periodic Table | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Fermium << Mendelevium >> Nobelium |
Spotted a mistake/omission? - These pages are a work in progress, so please send all comments/corrections to jolyon@mindat.org. Thank you.
Constants and physical property data from:
David R. Lide (ed.), CRC Handbook of Chemistry and Physics, 85th Edition. CRC Press. Boca Raton, Florida (2005).
Kaye and Laby Tables of Physical & Chemical Constants (2005). Section 3.1.3, Abundances of the elements
A. Earnshaw, N. Greenwood, Chemistry of the Elements, 2nd edition, Butterworth-Heinemann, (1997)
Thomas J. Ahrens (ed.), Global Earth Physics : A Handbook of Physical Constants, American Geophysical Union (1995)
L.B. Railsback, An Earth Scientist's Periodic Table of the Elements and Their Ions : Geology 31:9 p737-740 (2003)
Emsley, J. Nature's Building Blocks: An A-Z Guide to the Elements. New York: Oxford University Press (2001)