Fermium (Fm)

unsur kimia dengan lambang Fm dan nomor atom 100

Nomor atom	100
Massa atom	257
Nomor massa	241

Golongan
Periode	7
Blok	f

Proton	100 p⁺
Neutron	141 n⁰
Elektron	100 e^-

Sifat Fisik

Jari-Jari Atom
Volume molar
Jari-jari kovalen	167 pm
Metallic Radius
Jari-jari ion	110,5 pm
Crystal Radius	124,5 pm
Jari-jari van der Waals	245 pm 328,6 pm
kepadatan	9,7 g/cm³

Sifat Kimia

Energi

proton affinity
Afinitas elektron
Energi ionisasi	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

Panas penguapan
kalor peleburan
Perubahan entalpi pembentukan standar
Elektron

kelopak elektron	2, 8, 18, 32, 30, 8, 2

Elektron valensi	2 ⓘ

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

bilangan oksidasi	2, 3
elektronegativitas	0.22485
Electrophilicity Index
kondisi dasar materi

fase zat	Solid
gaseous state of matter
Titik didih
Titik lebur	1.800,15 K
critical pressure
critical temperature
Titik tripel
appearance
warna	Tak berwarna #ffffff #b31fba #b31fba
appearance
Indeks bias
thermodynamic material property
Kondusivitas termal
Pemuaian
molar heat capacity
Kapasitas kalor molar
heat capacity ratio
electrical properties
tipe
konduktivitas listrik
resistivitas listrik
superkonduktivitas
magnetisme
tipe
Suseptibilitas magnetik batuan (Mass)
Suseptibilitas magnetik batuan (Molar)
Suseptibilitas magnetik batuan (Volume)
magnetic ordering
Curie temperature
Néel temperature
struktur
Struktur kristal	()
Konstanta kisi
Lattice Angles
mechanical property
Kekerasan
Modulus kompresi
Modulus geser
modulus Young
Rasio Poisson
kecepatan suara
klasifikasi
Kategori	Aktinida, Actinides
CAS Group
IUPAC Group
Glawe Number	44
Mendeleev Number	36
Pettifor Number	37
Geochemical Class
Klasifikasi Goldschmidt	synthetic

lain-lain

Gas Basicity
polarizability	113 ± 20 a₀
C6 Dispersion Coefficient
allotrope
neutron cross section	5.800
Neutron Mass Absorption
Bilangan kuantum	3H6
Grup ruang	()

Isotop fermium

Isotop stabil	0
Isotop tidak stabil	20
Natural Isotopes	0

²⁴¹Fm

Nomor massa	241
nomor neutron	141
bobot atom	241,074311 ± 0,000322 Da
g-factor
natural abundance
peluruhan radioaktif	☢️ radioactive element
Waktu paruh	730 ± 60 us
Spin	5/2
nuclear quadrupole moment
tanggal penemuan	2008
parity	+

modus peluruhan	intensitas
SF (spontaneous fission)
α (α emission)	14%
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	12%

²⁴²Fm

Nomor massa	242
nomor neutron	142
bobot atom	242,07343 ± 0,00043 Da
g-factor	0
natural abundance
peluruhan radioaktif	☢️ radioactive element
Waktu paruh	800 ± 200 us
Spin	0
nuclear quadrupole moment	0
tanggal penemuan	1975
parity	+

modus peluruhan	intensitas
SF (spontaneous fission)	100%
α (α emission)

²⁴³Fm

Nomor massa	243
nomor neutron	143
bobot atom	243,074414 ± 0,00014 Da
g-factor
natural abundance
peluruhan radioaktif	☢️ radioactive element
Waktu paruh	231 ± 9 ms
Spin	7/2
nuclear quadrupole moment
tanggal penemuan	1981
parity	-

modus peluruhan	intensitas
α (α emission)	91%
SF (spontaneous fission)	9%
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)

²⁴⁴Fm

Nomor massa	244
nomor neutron	144
bobot atom	244,074036 ± 0,000216 Da
g-factor	0
natural abundance
peluruhan radioaktif	☢️ radioactive element
Waktu paruh	3,12 ± 0,08 ms
Spin	0
nuclear quadrupole moment	0
tanggal penemuan	1967
parity	+

modus peluruhan	intensitas
SF (spontaneous fission)	97%
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	2%
α (α emission)	1%

²⁴⁵Fm

Nomor massa	245
nomor neutron	145
bobot atom	245,075354 ± 0,00021 Da
g-factor
natural abundance
peluruhan radioaktif	☢️ radioactive element
Waktu paruh	4,2 ± 1,3 s
Spin	1/2
nuclear quadrupole moment	0
tanggal penemuan	1967
parity	+

modus peluruhan	intensitas
α (α emission)	100%
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	7%
SF (spontaneous fission)	0.3%

²⁴⁶Fm

Nomor massa	246
nomor neutron	146
bobot atom	246,075353334 ± 0,000014675 Da
g-factor	0
natural abundance
peluruhan radioaktif	☢️ radioactive element
Waktu paruh	1,54 ± 0,04 s
Spin	0
nuclear quadrupole moment	0
tanggal penemuan	1966
parity	+

modus peluruhan	intensitas
α (α emission)	93.2%
SF (spontaneous fission)	6.8%
ϵ (electron capture)	1.3%

²⁴⁷Fm

Nomor massa	247
nomor neutron	147
bobot atom	247,076944 ± 0,000194 Da
g-factor
natural abundance
peluruhan radioaktif	☢️ radioactive element
Waktu paruh	31 ± 1 s
Spin	7/2
nuclear quadrupole moment
tanggal penemuan	1967
parity	+

modus peluruhan	intensitas
α (α emission)	64%
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)

²⁴⁸Fm

Nomor massa	248
nomor neutron	148
bobot atom	248,077185451 ± 0,000009122 Da
g-factor	0
natural abundance
peluruhan radioaktif	☢️ radioactive element
Waktu paruh	34,5 ± 1,2 s
Spin	0
nuclear quadrupole moment	0
tanggal penemuan	1958
parity	+

modus peluruhan	intensitas
α (α emission)	100%
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)
SF (spontaneous fission)	0.1%

²⁴⁹Fm

Nomor massa	249
nomor neutron	149
bobot atom	249,078926042 ± 0,000006668 Da
g-factor
natural abundance
peluruhan radioaktif	☢️ radioactive element
Waktu paruh	1,6 ± 0,1 m
Spin	7/2
nuclear quadrupole moment
tanggal penemuan	1960
parity	+

modus peluruhan	intensitas
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)
α (α emission)	33%

²⁵⁰Fm

Nomor massa	250
nomor neutron	150
bobot atom	250,079519765 ± 0,000008468 Da
g-factor	0
natural abundance
peluruhan radioaktif	☢️ radioactive element
Waktu paruh	31 ± 1,1 m
Spin	0
nuclear quadrupole moment	0
tanggal penemuan	1954
parity	+

modus peluruhan	intensitas
α (α emission)	100%
SF (spontaneous fission)	0.0069%
ϵ (electron capture)

²⁵¹Fm

Nomor massa	251
nomor neutron	151
bobot atom	251,08154513 ± 0,000015342 Da
g-factor
natural abundance
peluruhan radioaktif	☢️ radioactive element
Waktu paruh	5,3 ± 0,08 h
Spin	9/2
nuclear quadrupole moment
tanggal penemuan	1957
parity	-

modus peluruhan	intensitas
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	98.2%
α (α emission)	1.8%

²⁵²Fm

Nomor massa	252
nomor neutron	152
bobot atom	252,082466019 ± 0,000005604 Da
g-factor	0
natural abundance
peluruhan radioaktif	☢️ radioactive element
Waktu paruh	25,39 ± 0,04 h
Spin	0
nuclear quadrupole moment	0
tanggal penemuan	1956
parity	+

modus peluruhan	intensitas
α (α emission)	100%
SF (spontaneous fission)	0.0023%
2β⁺ (double β⁺ decay)

²⁵³Fm

Nomor massa	253
nomor neutron	153
bobot atom	253,085180945 ± 0,000001662 Da
g-factor
natural abundance
peluruhan radioaktif	☢️ radioactive element
Waktu paruh	3 ± 0,12 d
Spin	1/2
nuclear quadrupole moment	0
tanggal penemuan	1957
parity	+

modus peluruhan	intensitas
ϵ (electron capture)	88%
α (α emission)	12%

²⁵⁴Fm

Nomor massa	254
nomor neutron	154
bobot atom	254,086852424 ± 0,000001978 Da
g-factor	0
natural abundance
peluruhan radioaktif	☢️ radioactive element
Waktu paruh	3,24 ± 0,002 h
Spin	0
nuclear quadrupole moment	0
tanggal penemuan	1954
parity	+

modus peluruhan	intensitas
α (α emission)	99.9408%
SF (spontaneous fission)	0.0592%

²⁵⁵Fm

Nomor massa	255
nomor neutron	155
bobot atom	255,089963495 ± 0,000004223 Da
g-factor
natural abundance
peluruhan radioaktif	☢️ radioactive element
Waktu paruh	20,07 ± 0,07 h
Spin	7/2
nuclear quadrupole moment
tanggal penemuan	1954
parity	+

modus peluruhan	intensitas
α (α emission)	100%
SF (spontaneous fission)	2.4%

²⁵⁶Fm

Nomor massa	256
nomor neutron	156
bobot atom	256,091771699 ± 0,000003241 Da
g-factor	0
natural abundance
peluruhan radioaktif	☢️ radioactive element
Waktu paruh	157,1 ± 1,3 m
Spin	0
nuclear quadrupole moment	0
tanggal penemuan	1955
parity	+

modus peluruhan	intensitas
SF (spontaneous fission)	91.9%
α (α emission)	8.1%

²⁵⁷Fm

Nomor massa	257
nomor neutron	157
bobot atom	257,095105419 ± 0,000004669 Da
g-factor
natural abundance
peluruhan radioaktif	☢️ radioactive element
Waktu paruh	100,5 ± 0,2 d
Spin	9/2
nuclear quadrupole moment
tanggal penemuan	1964
parity	+

modus peluruhan	intensitas
α (α emission)	99.79%
SF (spontaneous fission)	0.21%

²⁵⁸Fm

Nomor massa	258
nomor neutron	158
bobot atom	258,097077 ± 0,000215 Da
g-factor	0
natural abundance
peluruhan radioaktif	☢️ radioactive element
Waktu paruh	370 ± 14 us
Spin	0
nuclear quadrupole moment	0
tanggal penemuan	1971
parity	+

modus peluruhan	intensitas
SF (spontaneous fission)	100%
α (α emission)

²⁵⁹Fm

Nomor massa	259
nomor neutron	159
bobot atom	259,100596 ± 0,000304 Da
g-factor
natural abundance
peluruhan radioaktif	☢️ radioactive element
Waktu paruh	1,5 ± 0,2 s
Spin
nuclear quadrupole moment
tanggal penemuan	1980
parity

modus peluruhan	intensitas
SF (spontaneous fission)	100%

²⁶⁰Fm

Nomor massa	260
nomor neutron	160
bobot atom	260,102809 ± 0,000467 Da
g-factor	0
natural abundance
peluruhan radioaktif	☢️ radioactive element
Waktu paruh
Spin	0
nuclear quadrupole moment	0
tanggal penemuan
parity	+

modus peluruhan	intensitas
SF (spontaneous fission)

sejarah

penemu atau pencipta	Argonne, Los Alamos, U of Calif
tempat penemuan	United States
tanggal penemuan	1953
etimologi	Named in honor of the scientist Enrico Fermi.
pelafalan	FER-mi-em (Inggris)

sumber

Kelimpahan alami
Kelimpahan di kerak bumi
natural abundance (samudra)
natural abundance (tubuh manusia)	0 %
natural abundance (Meteoroid)	0 %
natural abundance (matahari)	0 %
Kelimpahan di alam semesta	0 %

Nuclear Screening Constants

Fermium on ChemicalAid

Australian Educational Vocabulary ID	scot/3519
ChEBI ID	33394
ChemSpider ID	22434
DSSTOX compound identifier	DTXCID60147884
DSSTox substance ID	DTXSID60225393
Den Store Danske ID	fermium
Encyclopædia Universalis ID	fermium
Great Russian Encyclopedia Online ID	4709674
ID Gran Enciclopèdia Catalana	0108657
ID store leksikon Norwegia	fermium
InChI	InChI=1S/Fm
InChIKey	MIORUQGGZCBUGO-UHFFFAOYSA-N
OmegaWiki Defined Meaning	158627
Penanda KBpedia	Fermium
PubChem CID	23998
Römpp online ID	RD-06-00507
UNII	Q70I3KBF4W
USGS Thesaurus ID	1453
WordNet 3.1 Synset ID	14661517-n
nomor register CAS	7440-72-4
penanda Encyclopædia Britannica Online	science/fermium
penanda Freebase	/m/025rqck
penanda GND	4490995-0
penanda MeSH	D005286
penanda Treccani	fermio

Fermium (Fm)

Sifat Fisik

Sifat Kimia

lain-lain

Isotop 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