'S e eileamaid cheimigeach a tha ann an ameireagium le samhla Am agus àireamh atamach 95. 'S e actanach agus meatailt rèidio-bheò is bog a tha ann.Tha an aidheon +3 cudromach ann an eadar-sgoileaidhean ach 's ameireagium dà-ogsaid, far a bheil ameireagium a tha ann an cor ogsaideachadh (IV), a tha anns an cruth as cumanta ameireagium.

Ameireagium
Americium microscope.jpg
Diosg beag ameireagium fo maicreasgop.
Clàr pillteach
HHe
LiBeBCNOFNe
NaMgAlSiPSClAr
KCaScTiVCrMnFeCoNiCuZnGaGeAsSeBrKr
RbSrYZrNbMoTcRuRhPdAgCdInSnSbTeIXe
CsBa*HfTaWReOsIrPtAuHgTlPbBiPoAtRn
FrRa**RfDbSgBhHsMtDsRgCnNhFlMcLvTsOg
*LaCePrNdPmSmEuGdTbDyHoErTmYbLu
**AcThPaUNpPuAmCmBkCfEsFmMdNoLr
Buadhan
SamhlaAm
Àireamh95
Ùine7
Blocaf
SeòrsaActanach
Buadhan stuthach
DathAirgead-liath
Teothachd leaghaidh1449 K ​(1176 °C, ​2149 °F)
Buadhan atamach
Tomad atamach/Da(243) neo-sheasmhach
Comh-dhealbhadh atamach[Rn] 5f7 7s2
Cor ogsaideachaidh+2, +3, +4, +5, +6, +7
1mh lùth aidheonachaidh/kJ mol–1578 kJ/mol

Rinneadh caractarachd ri 19 iosatòpaichean ameireagium. Tha 243Am, le leth-bheatha 7370 bliadhna, agus 241Am, le leth-bheatha 432.2 bliadhna, as seasmhaiche.

Eachdraidh

Ann an 1944 rinneadh an toiseach ameireagium aig Glenn Theodore Seaborg, Leon O. Morgan, Ralph A. James, agus Albert Ghiorso.Chleachd iad an greasadair-mhìrean 60 òirleach aig Oilthigh Chalafòrnia, Berkeley.Dh'ainmicheadh iad air Ameireaga, co-shìnte ri eòrpium anns an t-sreath nan lantanach.

Cleachdadh

Cleachdar ameireagium-241 ann an innealan-raibhe toite agus cuideachd eileamaidean nas truime a dhèanamh, mar eisimpleir ununpentium.

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