Amerizioa (Am)

Zenbaki atomikoa 95 duen elementu kimiko artifizial eta erradioaktiboa, aktinidoen seriekoa. Transuranidoen multzokoa da.

Atomic Number	95
Atomic Weight	243
masa-zenbaki	223

Group
Period	7
Block	f

protoi	95 p⁺
neutroi	128 n⁰
elektroi	95 e^-

Animated Bohrren eredu atomikoa of Am (Amerizioa)

Propietate Fisiko

Erradio Atomiko	175 pm 276 pm
bolumen molar	20,8 cm³/mol
Erradio Kobalente	166 pm 135 pm 180 pm
Metallic Radius
Erradio ioniko	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
Van der Waalsen erradio	244 pm 338,1 pm
dentsitatea	12 g/cm³

Magnitude Fisiko

{ERROR}

energia

proton affinity
Afinitate elektroniko
ionizazio energia	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

Irakite-entalpia	238,5 kJ/mol
urtze-entalpia	10 kJ/mol
formazio entalpia estandarra	284 kJ/mol
elektroi

elektroi geruza	2, 8, 18, 32, 25, 8, 2

balentzia-elektroi	2 ⓘ

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

Oxidazio-egoera	2, 3, 4, 5, 6, 7
Elektronegatibotasun	0.17194
Electrophilicity Index
materiaren funtsezko egoera

materiaren egoera
materiaren egoera gaseoso
Boiling Point
Melting Point	1.449,15 K
critical pressure
critical temperature
Puntu hirukoitz
appearance
kolore	Black #ffffff #545cf2 #545cf2
appearance	silvery white
errefrakzio-indize
thermodynamic material property
Thermal Conductivity
Bero-dilatazio
molar heat capacity
Specific Heat Capacity
indize adiabatiko
electrical properties
type
Eroankortasun elektriko
Erresistibitate elektriko
Supereroankortasun	0,6 K
Magnetismo
type	paramagnetic
suszeptibilitate magnetiko (Mass)	0,0000000515 m³/Kg
suszeptibilitate magnetiko (Molar)	0,00000001251 m³/mol
suszeptibilitate magnetiko (Volume)	0,000704
magnetic ordering
Curieren tenperatura
Néel temperature
egitura
Crystal Structure	{ERROR}
lattice constant
Lattice Angles	π/2, π/2, 2 π/3
materialen propietate mekaniko
Gogortasun
konprimagarritasun-modulu
Zizaila modulua
Youngen modulu
Poissonen modulu
Soinuaren lastertasun
classification
Category	Actinides, Actinides
CAS Group
IUPAC Group
Glawe Number	39
Mendeleev Number	26
Pettifor Number	42
Geochemical Class
Goldschmidt classification	synthetic

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Gas Basicity
polarizability	131 ± 25 a₀
C6 Dispersion Coefficient
allotrope
Neutron cross section	74
Neutron Mass Absorption
zenbaki kuantiko	8S7/2
talde espazial	194 (P63/mmc)

Isotopes of Americium

Stable Isotopes	0
Unstable Isotopes	27
Natural Isotopes	0

²²³Am

masa-zenbaki	223
neutron number	128
Atomo-Masa Erlatibo	223,04584 ± 0,000322 Da
g-factor
natural abundance
desintegrazio erradioaktibo	☢️ radioactive element
Semidesintegrazio-periodo	10 ± 9 ms
spin	9/2
nuclear quadrupole moment
aurkikuntza-data	2015
parity	-

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

²²⁴Am

masa-zenbaki	224
neutron number	129
Atomo-Masa Erlatibo	224,046442 ± 0,000429 Da
g-factor
natural abundance
desintegrazio erradioaktibo	☢️ radioactive element
Semidesintegrazio-periodo
spin
nuclear quadrupole moment
aurkikuntza-data
parity

decay mode	intensity
α (α emission)
SF (spontaneous fission)

²²⁵Am

masa-zenbaki	225
neutron number	130
Atomo-Masa Erlatibo	225,045508 ± 0,000429 Da
g-factor
natural abundance
desintegrazio erradioaktibo	☢️ radioactive element
Semidesintegrazio-periodo
spin	9/2
nuclear quadrupole moment
aurkikuntza-data
parity	-

decay mode	intensity
α (α emission)
SF (spontaneous fission)

²²⁶Am

masa-zenbaki	226
neutron number	131
Atomo-Masa Erlatibo	226,04613 ± 0,000322 Da
g-factor
natural abundance
desintegrazio erradioaktibo	☢️ radioactive element
Semidesintegrazio-periodo
spin
nuclear quadrupole moment
aurkikuntza-data
parity

decay mode	intensity
α (α emission)
SF (spontaneous fission)

²²⁷Am

masa-zenbaki	227
neutron number	132
Atomo-Masa Erlatibo	227,045282 ± 0,000215 Da
g-factor
natural abundance
desintegrazio erradioaktibo	☢️ radioactive element
Semidesintegrazio-periodo
spin	9/2
nuclear quadrupole moment
aurkikuntza-data
parity	-

decay mode	intensity
α (α emission)
SF (spontaneous fission)

²²⁸Am

masa-zenbaki	228
neutron number	133
Atomo-Masa Erlatibo	228,046001 ± 0,000215 Da
g-factor
natural abundance
desintegrazio erradioaktibo	☢️ radioactive element
Semidesintegrazio-periodo
spin
nuclear quadrupole moment
aurkikuntza-data
parity

decay mode	intensity
α (α emission)
SF (spontaneous fission)

²²⁹Am

masa-zenbaki	229
neutron number	134
Atomo-Masa Erlatibo	229,045282534 ± 0,000114169 Da
g-factor
natural abundance
desintegrazio erradioaktibo	☢️ radioactive element
Semidesintegrazio-periodo	1,8 ± 1,5 s
spin	5/2
nuclear quadrupole moment
aurkikuntza-data	2015
parity	-

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

²³⁰Am

masa-zenbaki	230
neutron number	135
Atomo-Masa Erlatibo	230,046025 ± 0,000153 Da
g-factor
natural abundance
desintegrazio erradioaktibo	☢️ radioactive element
Semidesintegrazio-periodo	40 ± 9 s
spin	1
nuclear quadrupole moment
aurkikuntza-data	2003
parity	-

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

²³¹Am

masa-zenbaki	231
neutron number	136
Atomo-Masa Erlatibo	231,045529 ± 0,000322 Da
g-factor
natural abundance
desintegrazio erradioaktibo	☢️ radioactive element
Semidesintegrazio-periodo
spin	5/2
nuclear quadrupole moment
aurkikuntza-data
parity	-

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

²³²Am

masa-zenbaki	232
neutron number	137
Atomo-Masa Erlatibo	232,046613 ± 0,000322 Da
g-factor
natural abundance
desintegrazio erradioaktibo	☢️ radioactive element
Semidesintegrazio-periodo	1,31 ± 0,04 m
spin	1
nuclear quadrupole moment
aurkikuntza-data	1967
parity	-

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

²³³Am

masa-zenbaki	233
neutron number	138
Atomo-Masa Erlatibo	233,046468 ± 0,000123 Da
g-factor
natural abundance
desintegrazio erradioaktibo	☢️ radioactive element
Semidesintegrazio-periodo	3,2 ± 0,8 m
spin	5/2
nuclear quadrupole moment
aurkikuntza-data	2000
parity	-

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

²³⁴Am

masa-zenbaki	234
neutron number	139
Atomo-Masa Erlatibo	234,047731 ± 0,000172 Da
g-factor	0
natural abundance
desintegrazio erradioaktibo	☢️ radioactive element
Semidesintegrazio-periodo	2,32 ± 0,08 m
spin	0
nuclear quadrupole moment	0
aurkikuntza-data	1967
parity	-

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

²³⁵Am

masa-zenbaki	235
neutron number	140
Atomo-Masa Erlatibo	235,047906478 ± 0,000056661 Da
g-factor
natural abundance
desintegrazio erradioaktibo	☢️ radioactive element
Semidesintegrazio-periodo	10,3 ± 0,6 m
spin	5/2
nuclear quadrupole moment
aurkikuntza-data	1996
parity	-

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

²³⁶Am

masa-zenbaki	236
neutron number	141
Atomo-Masa Erlatibo	236,049427 ± 0,000127 Da
g-factor
natural abundance
desintegrazio erradioaktibo	☢️ radioactive element
Semidesintegrazio-periodo	3,6 ± 0,1 m
spin	5
nuclear quadrupole moment
aurkikuntza-data	1998
parity	-

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

²³⁷Am

masa-zenbaki	237
neutron number	142
Atomo-Masa Erlatibo	237,049995 ± 0,000064 Da
g-factor
natural abundance
desintegrazio erradioaktibo	☢️ radioactive element
Semidesintegrazio-periodo	73,6 ± 0,8 m
spin	5/2
nuclear quadrupole moment
aurkikuntza-data	1970
parity	-

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

²³⁸Am

masa-zenbaki	238
neutron number	143
Atomo-Masa Erlatibo	238,051982531 ± 0,000063243 Da
g-factor
natural abundance
desintegrazio erradioaktibo	☢️ radioactive element
Semidesintegrazio-periodo	98 ± 3 m
spin	1
nuclear quadrupole moment
aurkikuntza-data	1950
parity	+

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

²³⁹Am

masa-zenbaki	239
neutron number	144
Atomo-Masa Erlatibo	239,053022729 ± 0,000002127 Da
g-factor
natural abundance
desintegrazio erradioaktibo	☢️ radioactive element
Semidesintegrazio-periodo	11,9 ± 0,1 h
spin	5/2
nuclear quadrupole moment
aurkikuntza-data	1949
parity	-

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

²⁴⁰Am

masa-zenbaki	240
neutron number	145
Atomo-Masa Erlatibo	240,055298374 ± 0,000014849 Da
g-factor
natural abundance
desintegrazio erradioaktibo	☢️ radioactive element
Semidesintegrazio-periodo	50,8 ± 0,3 h
spin	3
nuclear quadrupole moment
aurkikuntza-data	1949
parity	-

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

²⁴¹Am

masa-zenbaki	241
neutron number	146
Atomo-Masa Erlatibo	241,056827343 ± 0,000001195 Da
g-factor	0,64 ± 0,004
natural abundance
desintegrazio erradioaktibo	☢️ radioactive element
Semidesintegrazio-periodo	432,6 ± 0,6 y
spin	5/2
nuclear quadrupole moment	4,34 ± 0,05
aurkikuntza-data	1949
parity	-

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

²⁴²Am

masa-zenbaki	242
neutron number	147
Atomo-Masa Erlatibo	242,059547358 ± 0,000001199 Da
g-factor	0,3854 ± 0,0017
natural abundance
desintegrazio erradioaktibo	☢️ radioactive element
Semidesintegrazio-periodo	16,02 ± 0,02 h
spin	1
nuclear quadrupole moment	−2,4 ± 0,4
aurkikuntza-data	1949
parity	-

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

²⁴³Am

masa-zenbaki	243
neutron number	148
Atomo-Masa Erlatibo	243,061379889 ± 0,00000149 Da
g-factor	0,608 ± 0,004
natural abundance
desintegrazio erradioaktibo	☢️ radioactive element
Semidesintegrazio-periodo	7,35 ± 0,009 ky
spin	5/2
nuclear quadrupole moment	4,32 ± 0,06
aurkikuntza-data	1950
parity	-

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

²⁴⁴Am

masa-zenbaki	244
neutron number	149
Atomo-Masa Erlatibo	244,064282892 ± 0,0000016 Da
g-factor
natural abundance
desintegrazio erradioaktibo	☢️ radioactive element
Semidesintegrazio-periodo	10,01 ± 0,03 h
spin	6
nuclear quadrupole moment
aurkikuntza-data	1950
parity	-

decay mode	intensity
β⁻ (β⁻ decay)	100%

²⁴⁵Am

masa-zenbaki	245
neutron number	150
Atomo-Masa Erlatibo	245,066452827 ± 0,000002024 Da
g-factor
natural abundance
desintegrazio erradioaktibo	☢️ radioactive element
Semidesintegrazio-periodo	2,05 ± 0,01 h
spin	5/2
nuclear quadrupole moment
aurkikuntza-data	1955
parity	+

decay mode	intensity
β⁻ (β⁻ decay)	100%

²⁴⁶Am

masa-zenbaki	246
neutron number	151
Atomo-Masa Erlatibo	246,069774 ± 0,000019 Da
g-factor
natural abundance
desintegrazio erradioaktibo	☢️ radioactive element
Semidesintegrazio-periodo	39 ± 3 m
spin	7
nuclear quadrupole moment
aurkikuntza-data	1955
parity	-

decay mode	intensity
β⁻ (β⁻ decay)	100%

²⁴⁷Am

masa-zenbaki	247
neutron number	152
Atomo-Masa Erlatibo	247,072092 ± 0,000107 Da
g-factor
natural abundance
desintegrazio erradioaktibo	☢️ radioactive element
Semidesintegrazio-periodo	23 ± 1,3 m
spin	5/2
nuclear quadrupole moment
aurkikuntza-data	1967
parity

decay mode	intensity
β⁻ (β⁻ decay)	100%

²⁴⁸Am

masa-zenbaki	248
neutron number	153
Atomo-Masa Erlatibo	248,075752 ± 0,000215 Da
g-factor
natural abundance
desintegrazio erradioaktibo	☢️ radioactive element
Semidesintegrazio-periodo
spin	3
nuclear quadrupole moment
aurkikuntza-data
parity	+

decay mode	intensity
β⁻ (β⁻ decay)

²⁴⁹Am

masa-zenbaki	249
neutron number	154
Atomo-Masa Erlatibo	249,07848 ± 0,00032 Da
g-factor
natural abundance
desintegrazio erradioaktibo	☢️ radioactive element
Semidesintegrazio-periodo
spin	5/2
nuclear quadrupole moment
aurkikuntza-data
parity

decay mode	intensity
β⁻ (β⁻ decay)

historia

aurkitzailea edo asmatzailea	G.T.Seaborg, R.A.James, L.O.Morgan, A.Ghiorso
aurkikuntzaren lekua	United States
aurkikuntza-data	1945
etimologia	Named for the American continent, by analogy with europium.
pronunciation	am-er-ISH-i-em (ingelesa)

source

Abundance
Abundance in Earth's crust
natural abundance (ozeano)
natural abundance (gizakiaren gorputza)	0 %
natural abundance (Meteoroide)	0 %
natural abundance (Eguzkia)	0 %
Abundance in Universe	0 %

Nuclear Screening Constants

Amerizioa on ChemicalAid

Amerizioa (Am)

Propietate Fisiko

Magnitude Fisiko

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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

historia

source

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