"Fermium" siû-thin kiên ke chhâ-phe̍t
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無編輯摘要 |
無編輯摘要 |
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Thi 1 hàng:
{{Infobox element
|number=100
|symbol=Fm
|name=fermium
|left=[[einsteinium]]
|right=[[mendelevium]]
|above=[[erbium|Er]]
|below=(Upb)
|series=actinium-hi
|group=n/a
|period=7
|block=f
|appearance=
|atomic mass=(257)
|electron configuration= [[[radon|Rn]]] 5f<sup>12</sup> 7s<sup>2</sup>
|electrons per shell=2, 8, 18, 32, 30, 8, 2
|phase=ku-thí
|phase comment=''(predicted)''
|density gpcm3nrt=9.7(1)–10.3(3)
|density gpcm3nrt comment=''(predicted)''<ref name=density>{{cite journal |last=Fournier |first=Jean-Marc |date=1976 |title=Bonding and the electronic structure of the actinide metals |journal=Journal of Physics and Chemistry of Solids |volume=37 |issue=2 |pages=235–244 |doi=10.1016/0022-3697(76)90167-0}}</ref>
|melting point K=1800
|melting point C=1527
|melting point F=2781
|melting point comment=''(predicted)''
|crystal structure=
|oxidation states=2, '''3'''
|electronegativity=1.3
|number of ionization energies=1
|ionization energy 1=627
|ionization energy comment=(estimated)
|CAS number=7440-72-4
|isotopes=
{{infobox element/isotopes decay2 | mn=252 | sym=Fm
| na=[[synthetic radioisotope|syn]] | hl=[[1 E4 s|25.39 h]]
| dm1=[[spontaneous fission|SF]] | de1=– | pn1= | ps1=–
| dm2=[[alpha emission|α]] | de2=7.153 | link2=californium-248 | pn2=248 | ps2=Cf}}
{{infobox element/isotopes decay2 | mn=253 | sym=Fm
| na=syn | hl=[[1 E5 s|3 d]]
| dm1=[[electron capture|ε]] | de1=0.333 | link1=einsteinium-253 | pn1=253 | ps1=Es
| dm2=α | de2=7.197 | link2=californium-249 | pn2=249 | ps2=Cf}}
{{infobox element/isotopes decay2 | mn=255 | sym=Fm
| na=syn | hl=20.07 h
| dm1=SF | de1=– | pn1= | ps1=–
| dm2=α | de2=7.241 | link2=californium-251 | pn2=251 | ps2=Cf}}
{{infobox element/isotopes decay2 | mn=257 | sym=Fm
| na=syn | hl=[[1 E6 s|100.5 d]]
| dm1=α | de1=6.864 | link1=californium-253 | pn1=253 | ps1=Cf
| dm2=SF | de2=– | pn2= | ps2=–}}
|isotopes comment=
|naming=after [[Enrico Fermi]]
|discovered by=[[Lawrence Berkeley National Laboratory]]
|discovery date=1952
}}
'''Fermium''' he yit-chúng [[fa-ho̍k ngièn-su]], fa-ho̍k fù-ho vì '''Fm''', ngièn-chṳ́ su-muk he '''100'''.
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