Fermium (Fm)

chemical element with the atomic number of 100

Atomic Number	100
Atomic Weight	257
Nombor jisim	241

Group
Period	7
Block	f

proton	100 p⁺
neutron	141 n⁰
Elektron	100 e^-

Sifat Fizikal

Jejari Atom
molar volume
Jejari kovalen	167 pm
Metallic Radius
ionic radius	110.5 pm
Crystal Radius	124.5 pm
Jejari van der Waals	245 pm 328.6 pm
ketumpatan	9.7 g/cm³

Sifat Kimia

tenaga

proton affinity
Pertalian elektron
ionization energy	6.5 eV/particle 10 eV/particle 23.2 eV/particle 39.3 eV/particle 55 eV/particle 74 eV/particle 93 eV/particle 120 eV/particle 136 eV/particle 162 eV/particle 185 eV/particle 209 eV/particle 237 eV/particle 257 eV/particle 276 eV/particle 300 eV/particle 326 eV/particle 351 eV/particle 377 eV/particle 402 eV/particle 430 eV/particle 453 eV/particle 616 eV/particle 647 eV/particle 680 eV/particle 716 eV/particle 749 eV/particle 782 eV/particle 837 eV/particle 871 eV/particle 909 eV/particle 944 eV/particle 1,110 eV/particle 1,150 eV/particle 1,190 eV/particle 1,230 eV/particle 1,370 eV/particle 1,420 eV/particle 1,550 eV/particle 1,600 eV/particle 1,770 eV/particle 1,860 eV/particle 1,940 eV/particle 2,030 eV/particle 2,120 eV/particle 2,210 eV/particle 2,300 eV/particle 2,390 eV/particle 2,490 eV/particle 2,590 eV/particle 2,680 eV/particle 2,760 eV/particle 2,900 eV/particle 2,950 eV/particle 3,403 eV/particle 3,480 eV/particle 3,561 eV/particle 3,647 eV/particle 3,730 eV/particle 3,810 eV/particle 3,986 eV/particle 4,070 eV/particle 4,160 eV/particle 4,245 eV/particle 4,586 eV/particle 4,670 eV/particle 4,760 eV/particle 4,840 eV/particle 5,420 eV/particle 5,510 eV/particle 5,760 eV/particle 5,860 eV/particle 9,200 eV/particle 9,370 eV/particle 9,570 eV/particle 9,770 eV/particle 9,970 eV/particle 10,160 eV/particle 10,660 eV/particle 10,860 eV/particle 11,080 eV/particle 11,280 eV/particle 11,850 eV/particle 12,020 eV/particle 12,220 eV/particle 12,390 eV/particle 14,180 eV/particle 14,400 eV/particle 14,800 eV/particle 15,000 eV/particle 30,300 eV/particle 30,800 eV/particle 31,300 eV/particle 31,800 eV/particle 38,400 eV/particle 39,100 eV/particle 40,000 eV/particle 40,482.2 eV/particle 158,152.5 eV/particle 160,804 eV/particle

Entalpi pengewapan
entalpi pelakuran
standard enthalpy of formation
Elektron

Petala elektron	2, 8, 18, 32, 30, 8, 2

Elektron valens	2 ⓘ

tatarajah elektron	[Rn] 5f¹² 7s²ⓘ 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 6s² 4f¹⁴ 5d¹⁰ 6p⁶ 5f¹² 7s²

Keadaan pengoksidaan	2, 3
Keelektronegatifan	0.22485
Electrophilicity Index
keadaan jirim asas

fasa jirim	Solid
gaseous state of matter
Boiling Point
Melting Point	1,800.15 K
critical pressure
critical temperature
triple point
rupa
warna	Colorless #ffffff #b31fba #b31fba
rupa
indeks biasan
sifat bahan
Thermal Conductivity
Pengembangan terma
molar heat capacity
Specific Heat Capacity
heat capacity ratio
electrical properties
type
Kekonduksian elektrik
Kerintangan dan kekonduksian elektrik
Kesuperkonduksian
kemagnetan
type
magnetic susceptibility (Mass)
magnetic susceptibility (Molar)
magnetic susceptibility (Volume)
magnetic ordering
Suhu Curie
Néel temperature
struktur
Crystal Structure	()
lattice constant
Lattice Angles
mechanical property
hardness
Modulus pukal
shear modulus
Young's modulus
Nisbah Poisson
Kelajuan bunyi
pengelasan
Category	Actinides, Actinides
CAS Group
IUPAC Group
Glawe Number	44
Mendeleev Number	36
Pettifor Number	37
Geochemical Class
Goldschmidt classification	synthetic

other

Gas Basicity
polarizability	113 ± 20 a₀
C6 Dispersion Coefficient
allotrope
Neutron cross section	5,800
Neutron Mass Absorption
Nombor kuantum	3H6
space group	()

Isotopes of Fermium

Stable Isotopes	0
Unstable Isotopes	20
Natural Isotopes	0

²⁴¹Fm

Nombor jisim	241
nombor neutron	141
Jisim Atom Relatif	241.074311 ± 0.000322 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	730 ± 60 us
Spin	5/2
nuclear quadrupole moment
tarikh penemuan	2008
parity	+

decay mode	Keamatan (fizik)
SF (spontaneous fission)
α (α emission)	14%
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	12%

²⁴²Fm

Nombor jisim	242
nombor neutron	142
Jisim Atom Relatif	242.07343 ± 0.00043 Da
g-factor	0
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	800 ± 200 us
Spin	0
nuclear quadrupole moment	0
tarikh penemuan	1975
parity	+

decay mode	Keamatan (fizik)
SF (spontaneous fission)	100%
α (α emission)

²⁴³Fm

Nombor jisim	243
nombor neutron	143
Jisim Atom Relatif	243.074414 ± 0.00014 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	231 ± 9 ms
Spin	7/2
nuclear quadrupole moment
tarikh penemuan	1981
parity	-

decay mode	Keamatan (fizik)
α (α emission)	91%
SF (spontaneous fission)	9%
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)

²⁴⁴Fm

Nombor jisim	244
nombor neutron	144
Jisim Atom Relatif	244.074036 ± 0.000216 Da
g-factor	0
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	3.12 ± 0.08 ms
Spin	0
nuclear quadrupole moment	0
tarikh penemuan	1967
parity	+

decay mode	Keamatan (fizik)
SF (spontaneous fission)	97%
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	2%
α (α emission)	1%

²⁴⁵Fm

Nombor jisim	245
nombor neutron	145
Jisim Atom Relatif	245.075354 ± 0.00021 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	4.2 ± 1.3 s
Spin	1/2
nuclear quadrupole moment	0
tarikh penemuan	1967
parity	+

decay mode	Keamatan (fizik)
α (α emission)	100%
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	7%
SF (spontaneous fission)	0.3%

²⁴⁶Fm

Nombor jisim	246
nombor neutron	146
Jisim Atom Relatif	246.075353334 ± 0.000014675 Da
g-factor	0
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	1.54 ± 0.04 s
Spin	0
nuclear quadrupole moment	0
tarikh penemuan	1966
parity	+

decay mode	Keamatan (fizik)
α (α emission)	93.2%
SF (spontaneous fission)	6.8%
ϵ (electron capture)	1.3%

²⁴⁷Fm

Nombor jisim	247
nombor neutron	147
Jisim Atom Relatif	247.076944 ± 0.000194 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	31 ± 1 s
Spin	7/2
nuclear quadrupole moment
tarikh penemuan	1967
parity	+

decay mode	Keamatan (fizik)
α (α emission)	64%
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)

²⁴⁸Fm

Nombor jisim	248
nombor neutron	148
Jisim Atom Relatif	248.077185451 ± 0.000009122 Da
g-factor	0
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	34.5 ± 1.2 s
Spin	0
nuclear quadrupole moment	0
tarikh penemuan	1958
parity	+

decay mode	Keamatan (fizik)
α (α emission)	100%
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)
SF (spontaneous fission)	0.1%

²⁴⁹Fm

Nombor jisim	249
nombor neutron	149
Jisim Atom Relatif	249.078926042 ± 0.000006668 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	1.6 ± 0.1 m
Spin	7/2
nuclear quadrupole moment
tarikh penemuan	1960
parity	+

decay mode	Keamatan (fizik)
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)
α (α emission)	33%

²⁵⁰Fm

Nombor jisim	250
nombor neutron	150
Jisim Atom Relatif	250.079519765 ± 0.000008468 Da
g-factor	0
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	31 ± 1.1 m
Spin	0
nuclear quadrupole moment	0
tarikh penemuan	1954
parity	+

decay mode	Keamatan (fizik)
α (α emission)	100%
SF (spontaneous fission)	0.0069%
ϵ (electron capture)

²⁵¹Fm

Nombor jisim	251
nombor neutron	151
Jisim Atom Relatif	251.08154513 ± 0.000015342 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	5.3 ± 0.08 h
Spin	9/2
nuclear quadrupole moment
tarikh penemuan	1957
parity	-

decay mode	Keamatan (fizik)
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	98.2%
α (α emission)	1.8%

²⁵²Fm

Nombor jisim	252
nombor neutron	152
Jisim Atom Relatif	252.082466019 ± 0.000005604 Da
g-factor	0
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	25.39 ± 0.04 h
Spin	0
nuclear quadrupole moment	0
tarikh penemuan	1956
parity	+

decay mode	Keamatan (fizik)
α (α emission)	100%
SF (spontaneous fission)	0.0023%
2β⁺ (double β⁺ decay)

²⁵³Fm

Nombor jisim	253
nombor neutron	153
Jisim Atom Relatif	253.085180945 ± 0.000001662 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	3 ± 0.12 d
Spin	1/2
nuclear quadrupole moment	0
tarikh penemuan	1957
parity	+

decay mode	Keamatan (fizik)
ϵ (electron capture)	88%
α (α emission)	12%

²⁵⁴Fm

Nombor jisim	254
nombor neutron	154
Jisim Atom Relatif	254.086852424 ± 0.000001978 Da
g-factor	0
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	3.24 ± 0.002 h
Spin	0
nuclear quadrupole moment	0
tarikh penemuan	1954
parity	+

decay mode	Keamatan (fizik)
α (α emission)	99.9408%
SF (spontaneous fission)	0.0592%

²⁵⁵Fm

Nombor jisim	255
nombor neutron	155
Jisim Atom Relatif	255.089963495 ± 0.000004223 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	20.07 ± 0.07 h
Spin	7/2
nuclear quadrupole moment
tarikh penemuan	1954
parity	+

decay mode	Keamatan (fizik)
α (α emission)	100%
SF (spontaneous fission)	2.4%

²⁵⁶Fm

Nombor jisim	256
nombor neutron	156
Jisim Atom Relatif	256.091771699 ± 0.000003241 Da
g-factor	0
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	157.1 ± 1.3 m
Spin	0
nuclear quadrupole moment	0
tarikh penemuan	1955
parity	+

decay mode	Keamatan (fizik)
SF (spontaneous fission)	91.9%
α (α emission)	8.1%

²⁵⁷Fm

Nombor jisim	257
nombor neutron	157
Jisim Atom Relatif	257.095105419 ± 0.000004669 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	100.5 ± 0.2 d
Spin	9/2
nuclear quadrupole moment
tarikh penemuan	1964
parity	+

decay mode	Keamatan (fizik)
α (α emission)	99.79%
SF (spontaneous fission)	0.21%

²⁵⁸Fm

Nombor jisim	258
nombor neutron	158
Jisim Atom Relatif	258.097077 ± 0.000215 Da
g-factor	0
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	370 ± 14 us
Spin	0
nuclear quadrupole moment	0
tarikh penemuan	1971
parity	+

decay mode	Keamatan (fizik)
SF (spontaneous fission)	100%
α (α emission)

²⁵⁹Fm

Nombor jisim	259
nombor neutron	159
Jisim Atom Relatif	259.100596 ± 0.000304 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	1.5 ± 0.2 s
Spin
nuclear quadrupole moment
tarikh penemuan	1980
parity

decay mode	Keamatan (fizik)
SF (spontaneous fission)	100%

²⁶⁰Fm

Nombor jisim	260
nombor neutron	160
Jisim Atom Relatif	260.102809 ± 0.000467 Da
g-factor	0
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat
Spin	0
nuclear quadrupole moment	0
tarikh penemuan
parity	+

decay mode	Keamatan (fizik)
SF (spontaneous fission)

sejarah

penemu atau pereka	Argonne, Los Alamos, U of Calif
tempat penemuan	United States
tarikh penemuan	1953
Etimologi	Named in honor of the scientist Enrico Fermi.
sebutan	FER-mi-em (Inggeris)

sumber

Abundance
Abundance in Earth's crust
natural abundance (lautan)
natural abundance (Tubuh manusia)	0 %
natural abundance (Meteoroid)	0 %
natural abundance (Matahari)	0 %
Abundance in Universe	0 %

Nuclear Screening Constants

Fermium on ChemicalAid

ChEBI ID	33394
ChemSpider ID	22434
DSSTOX compound identifier	DTXCID60147884
ID Den Store Danske	fermium
ID Encyclopædia Universalis	fermium
ID Ensiklopedia Besar Rusia dalam talian	4709674
ID Ensiklopedia Britannica Dalam Talian	science/fermium
ID Freebase	/m/025rqck
ID GND	4490995-0
ID Gran Enciclopèdia Catalana	0108657
ID KBpedia	Fermium
ID Perbendaharaan Kata Pendidikan Australia	scot/3519
ID Store norske leksikon	fermium
ID Treccani	fermio
ID WordNet 3.1 Synset	14661517-n
ID bahan DSSTox	DTXSID60225393
ID pemerihal MeSH	D005286
InChI	InChI=1S/Fm
InChIKey	MIORUQGGZCBUGO-UHFFFAOYSA-N
Maksud Tertakrif OmegaWiki	158627
PubChem CID	23998
Römpp online ID	RD-06-00507
UNII	Q70I3KBF4W
USGS Thesaurus ID	1453
nombor pendaftaran CAS	7440-72-4

Fermium (Fm)

Sifat Fizikal

Sifat Kimia

other

Isotopes of Fermium

241Fm

242Fm

243Fm

244Fm

245Fm

246Fm

247Fm

248Fm

249Fm

250Fm

251Fm

252Fm

253Fm

254Fm

255Fm

256Fm

257Fm

258Fm

259Fm

260Fm

sejarah

sumber

Nuclear Screening Constants

²⁴¹Fm

²⁴²Fm

²⁴³Fm

²⁴⁴Fm

²⁴⁵Fm

²⁴⁶Fm

²⁴⁷Fm

²⁴⁸Fm

²⁴⁹Fm

²⁵⁰Fm

²⁵¹Fm

²⁵²Fm

²⁵³Fm

²⁵⁴Fm

²⁵⁵Fm

²⁵⁶Fm

²⁵⁷Fm

²⁵⁸Fm

²⁵⁹Fm

²⁶⁰Fm