Amerisium (Am)

chemical element with the atomic number of 95

Atomic Number	95
Atomic Weight	243
Nombor jisim	223

Group
Period	7
Block	f

proton	95 p⁺
neutron	128 n⁰
Elektron	95 e^-

Sifat Fizikal

Jejari Atom	175 pm 276 pm
molar volume	20.8 cm³/mol
Jejari kovalen	166 pm 135 pm 180 pm
Metallic Radius
ionic radius	121 pm 126 pm 131 pm 97.5 pm 109 pm 85 pm 95 pm 115.7 pm
Crystal Radius	135 pm 140 pm 145 pm 111.5 pm 123 pm 99 pm 109 pm 129.7 pm
Jejari van der Waals	244 pm 338.1 pm
ketumpatan	12 g/cm³

Sifat Kimia

tenaga

proton affinity
Pertalian elektron
ionization energy	5.9738 eV/particle 11.7 eV/particle 21.7 eV/particle 36.8 eV/particle 50 eV/particle 67.9 eV/particle 95 eV/particle 110 eV/particle 126 eV/particle 141 eV/particle 162 eV/particle 184 eV/particle 206 eV/particle 225 eV/particle 242 eV/particle 284 eV/particle 305 eV/particle 424 eV/particle 451 eV/particle 481 eV/particle 511 eV/particle 541 eV/particle 571 eV/particle 616 eV/particle 646 eV/particle 680 eV/particle 711 eV/particle 860 eV/particle 900 eV/particle 940 eV/particle 980 eV/particle 1,090 eV/particle 1,130 eV/particle 1,240 eV/particle 1,280 eV/particle 1,410 eV/particle 1,490 eV/particle 1,570 eV/particle 1,650 eV/particle 1,740 eV/particle 1,820 eV/particle 1,900 eV/particle 1,980 eV/particle 2,070 eV/particle 2,160 eV/particle 2,240 eV/particle 2,320 eV/particle 2,410 eV/particle 2,000 eV/particle 2,874 eV/particle 2,946 eV/particle 3,021 eV/particle 3,101 eV/particle 3,178 eV/particle 3,251 eV/particle 3,402 eV/particle 3,479 eV/particle 3,563 eV/particle 3,641 eV/particle 3,956 eV/particle 4,033 eV/particle 4,115 eV/particle 4,191 eV/particle 4,642 eV/particle 4,733 eV/particle 4,960 eV/particle 5,050 eV/particle 8,040 eV/particle 8,210 eV/particle 8,400 eV/particle 8,590 eV/particle 8,770 eV/particle 8,950 eV/particle 9,380 eV/particle 9,560 eV/particle 9,770 eV/particle 9,960 eV/particle 10,490 eV/particle 10,650 eV/particle 10,830 eV/particle 11,000 eV/particle 12,400 eV/particle 12,600 eV/particle 13,000 eV/particle 13,190 eV/particle 27,110 eV/particle 27,550 eV/particle 28,040 eV/particle 28,500 eV/particle 33,700 eV/particle 34,300 eV/particle 35,100 eV/particle 35,549.4 eV/particle 139,769.5 eV/particle 142,161 eV/particle

Entalpi pengewapan	238.5 kJ/mol
entalpi pelakuran	10 kJ/mol
standard enthalpy of formation	284 kJ/mol
Elektron

Petala elektron	2, 8, 18, 32, 25, 8, 2

Elektron valens	2 ⓘ

tatarajah elektron	[Rn] 5f⁷ 7s²ⓘ 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 6s² 4f¹⁴ 5d¹⁰ 6p⁶ 5f⁷ 7s²

Keadaan pengoksidaan	2, 3, 4, 5, 6, 7
Keelektronegatifan	0.17194
Electrophilicity Index
keadaan jirim asas

fasa jirim	Solid
gaseous state of matter
Boiling Point
Melting Point	1,449.15 K
critical pressure
critical temperature
triple point
rupa
warna	Silver #ffffff #545cf2 #545cf2
rupa	silvery white
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	0.6 K
kemagnetan
type	paramagnetic
magnetic susceptibility (Mass)	0.0000000515 m³/Kg
magnetic susceptibility (Molar)	0.00000001251 m³/mol
magnetic susceptibility (Volume)	0.000704
magnetic ordering
Suhu Curie
Néel temperature
struktur
Crystal Structure	Simple Hexagonal ()
lattice constant
Lattice Angles	π/2, π/2, 2 π/3
mechanical property
hardness
Modulus pukal
shear modulus
Young's modulus
Nisbah Poisson
Kelajuan bunyi
pengelasan
Category	Actinides, Actinides
CAS Group
IUPAC Group
Glawe Number	39
Mendeleev Number	26
Pettifor Number	42
Geochemical Class
Goldschmidt classification	synthetic

other

Gas Basicity
polarizability	131 ± 25 a₀
C6 Dispersion Coefficient
allotrope
Neutron cross section	74
Neutron Mass Absorption
Nombor kuantum	8S7/2
space group	194 (P63/mmc)

Isotopes of Americium

Stable Isotopes	0
Unstable Isotopes	27
Natural Isotopes	0

²²³Am

Nombor jisim	223
nombor neutron	128
Jisim Atom Relatif	223.04584 ± 0.000322 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	10 ± 9 ms
Spin	9/2
nuclear quadrupole moment
tarikh penemuan	2015
parity	-

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

²²⁴Am

Nombor jisim	224
nombor neutron	129
Jisim Atom Relatif	224.046442 ± 0.000429 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat
Spin
nuclear quadrupole moment
tarikh penemuan
parity

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

²²⁵Am

Nombor jisim	225
nombor neutron	130
Jisim Atom Relatif	225.045508 ± 0.000429 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat
Spin	9/2
nuclear quadrupole moment
tarikh penemuan
parity	-

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

²²⁶Am

Nombor jisim	226
nombor neutron	131
Jisim Atom Relatif	226.04613 ± 0.000322 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat
Spin
nuclear quadrupole moment
tarikh penemuan
parity

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

²²⁷Am

Nombor jisim	227
nombor neutron	132
Jisim Atom Relatif	227.045282 ± 0.000215 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat
Spin	9/2
nuclear quadrupole moment
tarikh penemuan
parity	-

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

²²⁸Am

Nombor jisim	228
nombor neutron	133
Jisim Atom Relatif	228.046001 ± 0.000215 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat
Spin
nuclear quadrupole moment
tarikh penemuan
parity

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

²²⁹Am

Nombor jisim	229
nombor neutron	134
Jisim Atom Relatif	229.045282534 ± 0.000114169 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	1.8 ± 1.5 s
Spin	5/2
nuclear quadrupole moment
tarikh penemuan	2015
parity	-

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

²³⁰Am

Nombor jisim	230
nombor neutron	135
Jisim Atom Relatif	230.046025 ± 0.000153 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	40 ± 9 s
Spin	1
nuclear quadrupole moment
tarikh penemuan	2003
parity	-

decay mode	Keamatan (fizik)
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%
β⁺ SF (β⁺-delayed fission)	30%

²³¹Am

Nombor jisim	231
nombor neutron	136
Jisim Atom Relatif	231.045529 ± 0.000322 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat
Spin	5/2
nuclear quadrupole moment
tarikh penemuan
parity	-

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

²³²Am

Nombor jisim	232
nombor neutron	137
Jisim Atom Relatif	232.046613 ± 0.000322 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	1.31 ± 0.04 m
Spin	1
nuclear quadrupole moment
tarikh penemuan	1967
parity	-

decay mode	Keamatan (fizik)
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	97%
α (α emission)
β⁺ SF (β⁺-delayed fission)	0.069%

²³³Am

Nombor jisim	233
nombor neutron	138
Jisim Atom Relatif	233.046468 ± 0.000123 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	3.2 ± 0.8 m
Spin	5/2
nuclear quadrupole moment
tarikh penemuan	2000
parity	-

decay mode	Keamatan (fizik)
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)
α (α emission)	4.5%

²³⁴Am

Nombor jisim	234
nombor neutron	139
Jisim Atom Relatif	234.047731 ± 0.000172 Da
g-factor	0
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	2.32 ± 0.08 m
Spin	0
nuclear quadrupole moment	0
tarikh penemuan	1967
parity	-

decay mode	Keamatan (fizik)
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%
α (α emission)	0.039%
β⁺ SF (β⁺-delayed fission)	0.0066%

²³⁵Am

Nombor jisim	235
nombor neutron	140
Jisim Atom Relatif	235.047906478 ± 0.000056661 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	10.3 ± 0.6 m
Spin	5/2
nuclear quadrupole moment
tarikh penemuan	1996
parity	-

decay mode	Keamatan (fizik)
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	99.6%
α (α emission)	0.4%

²³⁶Am

Nombor jisim	236
nombor neutron	141
Jisim Atom Relatif	236.049427 ± 0.000127 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	3.6 ± 0.1 m
Spin	5
nuclear quadrupole moment
tarikh penemuan	1998
parity	-

decay mode	Keamatan (fizik)
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%
α (α emission)	4%

²³⁷Am

Nombor jisim	237
nombor neutron	142
Jisim Atom Relatif	237.049995 ± 0.000064 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	73.6 ± 0.8 m
Spin	5/2
nuclear quadrupole moment
tarikh penemuan	1970
parity	-

decay mode	Keamatan (fizik)
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	99.975%
α (α emission)	0.025%

²³⁸Am

Nombor jisim	238
nombor neutron	143
Jisim Atom Relatif	238.051982531 ± 0.000063243 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	98 ± 3 m
Spin	1
nuclear quadrupole moment
tarikh penemuan	1950
parity	+

decay mode	Keamatan (fizik)
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%
α (α emission)	1%

²³⁹Am

Nombor jisim	239
nombor neutron	144
Jisim Atom Relatif	239.053022729 ± 0.000002127 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	11.9 ± 0.1 h
Spin	5/2
nuclear quadrupole moment
tarikh penemuan	1949
parity	-

decay mode	Keamatan (fizik)
ϵ (electron capture)	99.99%
α (α emission)	0.01%

²⁴⁰Am

Nombor jisim	240
nombor neutron	145
Jisim Atom Relatif	240.055298374 ± 0.000014849 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	50.8 ± 0.3 h
Spin	3
nuclear quadrupole moment
tarikh penemuan	1949
parity	-

decay mode	Keamatan (fizik)
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%
α (α emission)	1.9%

²⁴¹Am

Nombor jisim	241
nombor neutron	146
Jisim Atom Relatif	241.056827343 ± 0.000001195 Da
g-factor	0.64 ± 0.004
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	432.6 ± 0.6 y
Spin	5/2
nuclear quadrupole moment	4.34 ± 0.05
tarikh penemuan	1949
parity	-

decay mode	Keamatan (fizik)
α (α emission)	100%
SF (spontaneous fission)	3.6%

²⁴²Am

Nombor jisim	242
nombor neutron	147
Jisim Atom Relatif	242.059547358 ± 0.000001199 Da
g-factor	0.3854 ± 0.0017
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	16.02 ± 0.02 h
Spin	1
nuclear quadrupole moment	-2.4 ± 0.4
tarikh penemuan	1949
parity	-

decay mode	Keamatan (fizik)
β⁻ (β⁻ decay)	82.7%
ϵ (electron capture)	17.3%

²⁴³Am

Nombor jisim	243
nombor neutron	148
Jisim Atom Relatif	243.061379889 ± 0.00000149 Da
g-factor	0.608 ± 0.004
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	7.35 ± 0.009 ky
Spin	5/2
nuclear quadrupole moment	4.32 ± 0.06
tarikh penemuan	1950
parity	-

decay mode	Keamatan (fizik)
α (α emission)	100%
SF (spontaneous fission)	3.7%

²⁴⁴Am

Nombor jisim	244
nombor neutron	149
Jisim Atom Relatif	244.064282892 ± 0.0000016 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	10.01 ± 0.03 h
Spin	6
nuclear quadrupole moment
tarikh penemuan	1950
parity	-

decay mode	Keamatan (fizik)
β⁻ (β⁻ decay)	100%

²⁴⁵Am

Nombor jisim	245
nombor neutron	150
Jisim Atom Relatif	245.066452827 ± 0.000002024 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	2.05 ± 0.01 h
Spin	5/2
nuclear quadrupole moment
tarikh penemuan	1955
parity	+

decay mode	Keamatan (fizik)
β⁻ (β⁻ decay)	100%

²⁴⁶Am

Nombor jisim	246
nombor neutron	151
Jisim Atom Relatif	246.069774 ± 0.000019 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	39 ± 3 m
Spin	7
nuclear quadrupole moment
tarikh penemuan	1955
parity	-

decay mode	Keamatan (fizik)
β⁻ (β⁻ decay)	100%

²⁴⁷Am

Nombor jisim	247
nombor neutron	152
Jisim Atom Relatif	247.072092 ± 0.000107 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat	23 ± 1.3 m
Spin	5/2
nuclear quadrupole moment
tarikh penemuan	1967
parity

decay mode	Keamatan (fizik)
β⁻ (β⁻ decay)	100%

²⁴⁸Am

Nombor jisim	248
nombor neutron	153
Jisim Atom Relatif	248.075752 ± 0.000215 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat
Spin	3
nuclear quadrupole moment
tarikh penemuan
parity	+

decay mode	Keamatan (fizik)
β⁻ (β⁻ decay)

²⁴⁹Am

Nombor jisim	249
nombor neutron	154
Jisim Atom Relatif	249.07848 ± 0.00032 Da
g-factor
natural abundance
Reputan radioaktif	☢️ radioactive element
setengah hayat
Spin	5/2
nuclear quadrupole moment
tarikh penemuan
parity

decay mode	Keamatan (fizik)
β⁻ (β⁻ decay)

sejarah

penemu atau pereka	G.T.Seaborg, R.A.James, L.O.Morgan, A.Ghiorso
tempat penemuan	United States
tarikh penemuan	1945
Etimologi	Named for the American continent, by analogy with europium.
sebutan	am-er-ISH-i-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

Amerisium on ChemicalAid

ChEBI ID	33389
ChemSpider ID	22405
DSSTOX compound identifier	DTXCID6047658
ECHA Substance Infocard ID	100.028.313
Encyclopedia of China ID (Second Edition)	220632
ID CAB	7535
ID Den Store Danske	americium
ID Elhuyar ZTH	020208
ID Encyclopædia Universalis	americium
ID Ensiklopedia Besar Rusia dalam talian	1817972
ID Ensiklopedia Britannica Dalam Talian	science/americium
ID Freebase	/m/027sxty
ID GND	4191405-3
ID J9U Perpustakaan Negara Israel	987007294067605171
ID KBpedia	Americium
ID Perbendaharaan Kata Pendidikan Australia	scot/1091
ID Store norske leksikon	americium
ID Treccani	americio
ID Vikidia Perancis	Américium
ID WordNet 3.1 Synset	14652672-n
ID bahan DSSTox	DTXSID3064693
ID kewibawaan Perpustakaan Kongres	sh85004443
ID pemerihal MeSH	D000576
InChI	InChI=1S/Am
InChIKey	LXQXZNRPTYVCNG-UHFFFAOYSA-N
Maksud Tertakrif OmegaWiki	155847
OpenAlex ID	C552554468
PDB ligand ID	AM
PDB structure ID	4ZHG
PubChem CID	23966
Römpp online ID	RD-01-01920
UNII	VW92PHU2UY
USGS Thesaurus ID	1392
nombor pendaftaran CAS	7440-35-9
pengecam NDL	00575178

Amerisium (Am)

Sifat Fizikal

Sifat Kimia

other

Isotopes of Americium

223Am

224Am

225Am

226Am

227Am

228Am

229Am

230Am

231Am

232Am

233Am

234Am

235Am

236Am

237Am

238Am

239Am

240Am

241Am

242Am

243Am

244Am

245Am

246Am

247Am

248Am

249Am

sejarah

sumber

Nuclear Screening Constants

²²³Am

²²⁴Am

²²⁵Am

²²⁶Am

²²⁷Am

²²⁸Am

²²⁹Am

²³⁰Am

²³¹Am

²³²Am

²³³Am

²³⁴Am

²³⁵Am

²³⁶Am

²³⁷Am

²³⁸Am

²³⁹Am

²⁴⁰Am

²⁴¹Am

²⁴²Am

²⁴³Am

²⁴⁴Am

²⁴⁵Am

²⁴⁶Am

²⁴⁷Am

²⁴⁸Am

²⁴⁹Am