Americium: Difference between revisions
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{{Elem_Infobox | |||
|elName=Americium | |||
|eltrnCfg=1s<sup>2</sup>2s<sup>2</sup>2p<sup>6</sup>3s<sup>2</sup>3p<sup>6</sup>3d<sup>10</sup>4s<sup>2</sup>4p<sup>6</sup> 4d<sup>10</sup>5s<sup>2</sup>5p<sup>6</sup>4f<sup>14</sup>5d<sup>10</sup>6s<sup>2</sup>6p<sup>6</sup>5f<sup>7</sup>7s<sup>2</sup> | |||
|no1= | |||
|no2= | |||
|no3= | |||
|no4= | |||
|properties=Silvery-white metal. | |||
|compounds= | |||
|uses= | |||
|hazard=Radioactive | |||
}} | |||
'''Americium''' is a [[Chemical elements|chemical element]], having the [[chemical symbol]] Am. Its [[atomic number]] (the number of [[proton]]s) is 95. It has a [[Atomic mass#Standard atomic weights of the elements|standard atomic weight]] of 243 g•mol<sup> −1</sup> and it is a [[solid]] in its elemental form. | |||
Americium is considered a member of the "Transuranic" class of elements. At a [[pressure]] of 101.325 k[[Pascal (unit)|Pa]], it has a [[boiling point]] of 2,011 °[[Celsius (unit)|C]] and a [[melting point]] of 1,176 °C. | |||
Americium was the fourth [[transuranic element]] to be identified. It was discovered by [[Glenn T Seeborg]] at the wartime ([[World War II]]) metallurgical laboratory of the [[University of Chicago]] in 1944.<ref>[http://periodic.lanl.gov/95.shtml Americium] From the website of the [[Los Alamos National Laboratory]] (LANL)</ref> The [[Plutonium]] isotopes Pu-241 and Pu-243 undergo [[β− decay]] transforming into [[isotopes]] of Americium. | |||
==References== | |||
<references/> | <references/> | ||
Revision as of 13:44, 3 May 2011
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Americium is a chemical element, having the chemical symbol Am. Its atomic number (the number of protons) is 95. It has a standard atomic weight of 243 g•mol −1 and it is a solid in its elemental form.
Americium is considered a member of the "Transuranic" class of elements. At a pressure of 101.325 kPa, it has a boiling point of 2,011 °C and a melting point of 1,176 °C.
Americium was the fourth transuranic element to be identified. It was discovered by Glenn T Seeborg at the wartime (World War II) metallurgical laboratory of the University of Chicago in 1944.[1] The Plutonium isotopes Pu-241 and Pu-243 undergo β− decay transforming into isotopes of Americium.
References
- ↑ Americium From the website of the Los Alamos National Laboratory (LANL)