Americij

Americij (Am)

chemical element with the atomic number of 95
Atomski broj95
Relativna atomska masa243
Maseni broj223
Skupina
Perioda7
Blokf
proton95 p+
neutron128 n0
elektron95 e-
Animated Bohrov model atoma of Am (Americij)

Physical Property

Atomski Radijus
175 pm
Molni volumen
Kovalentni Radijus
166 pm
Metallic Radius
Ionski radijus
121 pm
Crystal Radius
135 pm
Van der Waals radius
244 pm
gustoća
Atomic Radii Of The Elements: Americij0102030405060708090100110120130140150160170180190200210220230240250pmAtomski RadijusKovalentni RadijusMetallic RadiusVan der Waals radius

Kemijsko Svojstvo

energija
proton affinity
Elektronski afinitet
ionization energy
ionization energy of Am (Americij)
Toplina isparivanja
238,5 kJ/mol
toplina taljenja
standard enthalpy of formation
284 kJ/mol
elektron
Elektronska ljuska2, 8, 18, 32, 25, 8, 2
Bohrov model atoma: Am (Americij)
valence electron2
Lewis structure: Am (Americij)
electron configuration[Rn] 5f7 7s2
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f14 5d10 6p6 5f7 7s2
Enhanced Bohrov model atoma of Am (Americij)
Orbital Diagram of Am (Americij)
Oksidacijski broj2, 3, 4, 5, 6, 7
Elektronegativnost
Electrophilicity Index
fundamental state of matter
agregatno stanjeČvrsto
gaseous state of matter
Vrelište
Talište
1.449,15 K
critical pressure
critical temperature
Trojna točka
appearance
boja
Srebrna
appearancesilvery white
Indeks prelamanja
thermodynamic material property
Toplinska vodljivost
Toplinsko istezanje
molar heat capacity
Specifični toplinski kapacitet
heat capacity ratio
electrical properties
type
electrical conductivity
Električna otpornost i provodnost
Supravodljivost
0,6 K
Magnetizam
typeparamagnetic
Magnetna susceptibilnost (Mass)
0,0000000515 m³/Kg
Magnetna susceptibilnost (Molar)
0,00000001251 m³/mol
Magnetna susceptibilnost (Volume)
0,000704
magnetic ordering
Curieva temperatura
Néel temperature
struktura
Kristalna strukturaJednostavna heksagonska ()
lattice constant
Lattice Anglesπ/2, π/2, 2 π/3
mechanical property
Tvrdoća
bulk modulus
shear modulus
Youngov modul elastičnosti
Poissonov omjer
brzina zvuka
classification
KategorijaAktinoidi, Actinides
CAS Group
IUPAC Group
Glawe Number39
Mendeleev Number26
Pettifor Number42
Geochemical Class
Goldschmidt classificationsynthetic

other

Gas Basicity
polarizability
131 ± 25 a₀
C6 Dispersion Coefficient
allotrope
Nuklearni udarni presjek
74
Neutron Mass Absorption
Kvantni brojevi8S7/2
space group194 (P63/mmc)

Isotopes of Americium

Stabilni izotopi0
Nestabilni izotopi27
Natural Isotopes0

223Am

Maseni broj223
neutron number128
Relativna atomska masa
223,04584 ± 0,000322 Da
g-factor
natural abundance
radioaktivnost☢️ radioactive element
Vrijeme poluraspada
10 ± 9 ms
spin9/2
nuclear quadrupole moment
vrijeme otkrića ili izuma2015
Parnost-

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

224Am

Maseni broj224
neutron number129
Relativna atomska masa
224,046442 ± 0,000429 Da
g-factor
natural abundance
radioaktivnost☢️ radioactive element
Vrijeme poluraspada
spin
nuclear quadrupole moment
vrijeme otkrića ili izuma
Parnost

decay modeintensity
α (α emission)
SF (spontaneous fission)

225Am

Maseni broj225
neutron number130
Relativna atomska masa
225,045508 ± 0,000429 Da
g-factor
natural abundance
radioaktivnost☢️ radioactive element
Vrijeme poluraspada
spin9/2
nuclear quadrupole moment
vrijeme otkrića ili izuma
Parnost-

decay modeintensity
α (α emission)
SF (spontaneous fission)

226Am

Maseni broj226
neutron number131
Relativna atomska masa
226,04613 ± 0,000322 Da
g-factor
natural abundance
radioaktivnost☢️ radioactive element
Vrijeme poluraspada
spin
nuclear quadrupole moment
vrijeme otkrića ili izuma
Parnost

decay modeintensity
α (α emission)
SF (spontaneous fission)

227Am

Maseni broj227
neutron number132
Relativna atomska masa
227,045282 ± 0,000215 Da
g-factor
natural abundance
radioaktivnost☢️ radioactive element
Vrijeme poluraspada
spin9/2
nuclear quadrupole moment
vrijeme otkrića ili izuma
Parnost-

decay modeintensity
α (α emission)
SF (spontaneous fission)

228Am

Maseni broj228
neutron number133
Relativna atomska masa
228,046001 ± 0,000215 Da
g-factor
natural abundance
radioaktivnost☢️ radioactive element
Vrijeme poluraspada
spin
nuclear quadrupole moment
vrijeme otkrića ili izuma
Parnost

decay modeintensity
α (α emission)
SF (spontaneous fission)

229Am

Maseni broj229
neutron number134
Relativna atomska masa
229,045282534 ± 0,000114169 Da
g-factor
natural abundance
radioaktivnost☢️ radioactive element
Vrijeme poluraspada
1,8 ± 1,5 s
spin5/2
nuclear quadrupole moment
vrijeme otkrića ili izuma2015
Parnost-

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

230Am

Maseni broj230
neutron number135
Relativna atomska masa
230,046025 ± 0,000153 Da
g-factor
natural abundance
radioaktivnost☢️ radioactive element
Vrijeme poluraspada
40 ± 9 s
spin1
nuclear quadrupole moment
vrijeme otkrića ili izuma2003
Parnost-

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

231Am

Maseni broj231
neutron number136
Relativna atomska masa
231,045529 ± 0,000322 Da
g-factor
natural abundance
radioaktivnost☢️ radioactive element
Vrijeme poluraspada
spin5/2
nuclear quadrupole moment
vrijeme otkrića ili izuma
Parnost-

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)
α (α emission)

232Am

Maseni broj232
neutron number137
Relativna atomska masa
232,046613 ± 0,000322 Da
g-factor
natural abundance
radioaktivnost☢️ radioactive element
Vrijeme poluraspada
1,31 ± 0,04 m
spin1
nuclear quadrupole moment
vrijeme otkrića ili izuma1967
Parnost-

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

233Am

Maseni broj233
neutron number138
Relativna atomska masa
233,046468 ± 0,000123 Da
g-factor
natural abundance
radioaktivnost☢️ radioactive element
Vrijeme poluraspada
3,2 ± 0,8 m
spin5/2
nuclear quadrupole moment
vrijeme otkrića ili izuma2000
Parnost-

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

234Am

Maseni broj234
neutron number139
Relativna atomska masa
234,047731 ± 0,000172 Da
g-factor
0
natural abundance
radioaktivnost☢️ radioactive element
Vrijeme poluraspada
2,32 ± 0,08 m
spin0
nuclear quadrupole moment
0
vrijeme otkrića ili izuma1967
Parnost-

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

235Am

Maseni broj235
neutron number140
Relativna atomska masa
235,047906478 ± 0,000056661 Da
g-factor
natural abundance
radioaktivnost☢️ radioactive element
Vrijeme poluraspada
10,3 ± 0,6 m
spin5/2
nuclear quadrupole moment
vrijeme otkrića ili izuma1996
Parnost-

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

236Am

Maseni broj236
neutron number141
Relativna atomska masa
236,049427 ± 0,000127 Da
g-factor
natural abundance
radioaktivnost☢️ radioactive element
Vrijeme poluraspada
3,6 ± 0,1 m
spin5
nuclear quadrupole moment
vrijeme otkrića ili izuma1998
Parnost-

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

237Am

Maseni broj237
neutron number142
Relativna atomska masa
237,049995 ± 0,000064 Da
g-factor
natural abundance
radioaktivnost☢️ radioactive element
Vrijeme poluraspada
73,6 ± 0,8 m
spin5/2
nuclear quadrupole moment
vrijeme otkrića ili izuma1970
Parnost-

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

238Am

Maseni broj238
neutron number143
Relativna atomska masa
238,051982531 ± 0,000063243 Da
g-factor
natural abundance
radioaktivnost☢️ radioactive element
Vrijeme poluraspada
98 ± 3 m
spin1
nuclear quadrupole moment
vrijeme otkrića ili izuma1950
Parnost+

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

239Am

Maseni broj239
neutron number144
Relativna atomska masa
239,053022729 ± 0,000002127 Da
g-factor
natural abundance
radioaktivnost☢️ radioactive element
Vrijeme poluraspada
11,9 ± 0,1 h
spin5/2
nuclear quadrupole moment
vrijeme otkrića ili izuma1949
Parnost-

decay modeintensity
ϵ (electron capture)99.99%
α (α emission)0.01%

240Am

Maseni broj240
neutron number145
Relativna atomska masa
240,055298374 ± 0,000014849 Da
g-factor
natural abundance
radioaktivnost☢️ radioactive element
Vrijeme poluraspada
50,8 ± 0,3 h
spin3
nuclear quadrupole moment
vrijeme otkrića ili izuma1949
Parnost-

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

241Am

Maseni broj241
neutron number146
Relativna atomska masa
241,056827343 ± 0,000001195 Da
g-factor
0,64 ± 0,004
natural abundance
radioaktivnost☢️ radioactive element
Vrijeme poluraspada
432,6 ± 0,6 y
spin5/2
nuclear quadrupole moment
4,34 ± 0,05
vrijeme otkrića ili izuma1949
Parnost-

decay modeintensity
α (α emission)100%
SF (spontaneous fission)3.6%

242Am

Maseni broj242
neutron number147
Relativna atomska masa
242,059547358 ± 0,000001199 Da
g-factor
0,3854 ± 0,0017
natural abundance
radioaktivnost☢️ radioactive element
Vrijeme poluraspada
16,02 ± 0,02 h
spin1
nuclear quadrupole moment
−2,4 ± 0,4
vrijeme otkrića ili izuma1949
Parnost-

decay modeintensity
β (β decay)82.7%
ϵ (electron capture)17.3%

243Am

Maseni broj243
neutron number148
Relativna atomska masa
243,061379889 ± 0,00000149 Da
g-factor
0,608 ± 0,004
natural abundance
radioaktivnost☢️ radioactive element
Vrijeme poluraspada
7,35 ± 0,009 ky
spin5/2
nuclear quadrupole moment
4,32 ± 0,06
vrijeme otkrića ili izuma1950
Parnost-

decay modeintensity
α (α emission)100%
SF (spontaneous fission)3.7%

244Am

Maseni broj244
neutron number149
Relativna atomska masa
244,064282892 ± 0,0000016 Da
g-factor
natural abundance
radioaktivnost☢️ radioactive element
Vrijeme poluraspada
10,01 ± 0,03 h
spin6
nuclear quadrupole moment
vrijeme otkrića ili izuma1950
Parnost-

decay modeintensity
β (β decay)100%

245Am

Maseni broj245
neutron number150
Relativna atomska masa
245,066452827 ± 0,000002024 Da
g-factor
natural abundance
radioaktivnost☢️ radioactive element
Vrijeme poluraspada
2,05 ± 0,01 h
spin5/2
nuclear quadrupole moment
vrijeme otkrića ili izuma1955
Parnost+

decay modeintensity
β (β decay)100%

246Am

Maseni broj246
neutron number151
Relativna atomska masa
246,069774 ± 0,000019 Da
g-factor
natural abundance
radioaktivnost☢️ radioactive element
Vrijeme poluraspada
39 ± 3 m
spin7
nuclear quadrupole moment
vrijeme otkrića ili izuma1955
Parnost-

decay modeintensity
β (β decay)100%

247Am

Maseni broj247
neutron number152
Relativna atomska masa
247,072092 ± 0,000107 Da
g-factor
natural abundance
radioaktivnost☢️ radioactive element
Vrijeme poluraspada
23 ± 1,3 m
spin5/2
nuclear quadrupole moment
vrijeme otkrića ili izuma1967
Parnost

decay modeintensity
β (β decay)100%

248Am

Maseni broj248
neutron number153
Relativna atomska masa
248,075752 ± 0,000215 Da
g-factor
natural abundance
radioaktivnost☢️ radioactive element
Vrijeme poluraspada
spin3
nuclear quadrupole moment
vrijeme otkrića ili izuma
Parnost+

decay modeintensity
β (β decay)

249Am

Maseni broj249
neutron number154
Relativna atomska masa
249,07848 ± 0,00032 Da
g-factor
natural abundance
radioaktivnost☢️ radioactive element
Vrijeme poluraspada
spin5/2
nuclear quadrupole moment
vrijeme otkrića ili izuma
Parnost

decay modeintensity
β (β decay)
Americium microscope

povijest

otkrio/izumioG.T.Seaborg, R.A.James, L.O.Morgan, A.Ghiorso
location of discoveryUnited States
vrijeme otkrića ili izuma1945
EtimologijaNamed for the American continent, by analogy with europium.
pronunciationam-er-ISH-i-em (engleski)

source

Obilnost
Zastupljenost u Zemljinoj kori
natural abundance (ocean)
natural abundance (tijelo)
0 %
natural abundance (meteoroid)
0 %
natural abundance (Sunce)
0 %
Zastupljenost u svemiru
0 %

Nuclear Screening Constants