Difference between revisions of "Fermium"
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| + | {{Infobox element | ||
| + | |name = fermium | ||
| + | |symbol = Fm | ||
| + | |left = [[einsteinium]] | ||
| + | |right = [[mendelevium]] | ||
| + | |above = [[Erbium|Er]] | ||
| + | |below = – | ||
| + | |atomic-number = 100 | ||
| + | |configuration = [Rn]5f<sup>12</sup> 6s<sup>2</sup> | ||
| + | |phys-ref = <ref name="H&G">Haire and Gibson (1989)</ref> | ||
| + | |melting-point = 1125 K (850 °C) ''est.'' | ||
| + | |density = | ||
| + | |chem-ref = | ||
| + | |electronegativity = 1.3 (Pauling) ''est.'' | ||
| + | |IE-ref = | ||
| + | |IE1 = 6.50 eV<br/>627 kJ mol<sup>−1</sup> | ||
| + | |radius-ref = <ref name="H&G"/><ref>David et al. (1978)</ref><ref>Brüchle et al. (1988)</ref> | ||
| + | |metallic-radius = 196 pm ''est.'' | ||
| + | |ionic-radius = 92 pm (Fm<sup>3+</sup>) ''est.'' | ||
| + | |thermo-ref = <ref name="H&G"/> | ||
| + | |enthalpy-atomization = 142(13) kJ mol<sup>−1</sup> | ||
| + | |misc-ref = | ||
| + | |CAS-number = 7440-72-4 | ||
| + | }} | ||
'''Fermium''' (symbol: '''Fm''') is a synthetic [[chemical element]] and a member of the [[actinoid]] series. It is the heaviest element than can be formed by [[neutron]] bombardment of lighter elements, and hence the last element that can be prepared in macroscopic quantities. | '''Fermium''' (symbol: '''Fm''') is a synthetic [[chemical element]] and a member of the [[actinoid]] series. It is the heaviest element than can be formed by [[neutron]] bombardment of lighter elements, and hence the last element that can be prepared in macroscopic quantities. | ||
Revision as of 07:57, 23 September 2010
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Fermium (symbol: Fm) is a synthetic chemical element and a member of the actinoid series. It is the heaviest element than can be formed by neutron bombardment of lighter elements, and hence the last element that can be prepared in macroscopic quantities.
Discovery
Notes and references
Notes
References
External links
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See also the corresponding article on Wikipedia. |
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