Americij[um]

Americij[um] (Am)

hemijski element sa simbolom Am i atomskim brojem 95
Atomic Number95
Atomic Weight243
Maseni broj223
Group
Period7
Blockf
Proton95 p+
Neutron128 n0
Elektron95 e-
Animated Bohrov model atoma of Am (Americij[um])

Physical Property

Atomski Radijus
175 pm
Molarni volumen
covalent radius
166 pm
Metallic Radius
Ionski radijus
121 pm
Crystal Radius
135 pm
Van der Waalsov radijus
244 pm
gustoća
Atomic Radii Of The Elements: Americij[um]0102030405060708090100110120130140150160170180190200210220230240250pmAtomski RadijusCovalent RadiusMetallic RadiusVan der Waalsov radijus

Chemical Property

energija
proton affinity
electron affinity
ionization energy
ionization energy of Am (Americij[um])
Toplota isparavanja
238,5 kJ/mol
toplota topljenja
standard enthalpy of formation
284 kJ/mol
Elektron
electron shell2, 8, 18, 32, 25, 8, 2
Bohrov model atoma: Am (Americij[um])
Valentni elektron2
Lewis structure: Am (Americij[um])
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[um])
Orbital Diagram of Am (Americij[um])
oksidacijsko stanje2, 3, 4, 5, 6, 7
Elektronegativnost
Electrophilicity Index
fundamental state of matter
agregatno stanjeSolid
gaseous state of matter
Boiling Point
Melting Point
1.449,15 K
critical pressure
Kritična temperatura
Trojna tačka
appearance
boja
Silver
appearancesilvery white
Indeks prelamanja
thermodynamic material property
Thermal Conductivity
thermal expansion
molar heat capacity
Specific Heat Capacity
heat capacity ratio
electrical properties
type
Specifična električna provodljivost
electrical resistivity
Superprovodljivost
0,6 K
Magnetizam
typeparamagnetic
magnetic susceptibility (Mass)
0,0000000515 m³/Kg
magnetic susceptibility (Molar)
0,00000001251 m³/mol
magnetic susceptibility (Volume)
0,000704
magnetic ordering
Kirijeva tačka
Néel temperature
struktura
Crystal StructureSimple Hexagonal ()
lattice constant
Lattice Anglesπ/2, π/2, 2 π/3
mechanical property
Tvrdoća
bulk modulus
shear modulus
Young's modulus
Poisson's ratio
Brzina zvuka
klasifikacija
CategoryActinides, 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
Neutron cross section
74
Neutron Mass Absorption
Kvantni brojevi8S7/2
space group194 (P63/mmc)

Isotopes of Americium

Stable Isotopes0
Unstable Isotopes27
Natural Isotopes0

223Am

Maseni broj223
broj neutrona128
relative atomic mass
223,04584 ± 0,000322 Da
g-factor
natural abundance
Radioaktivnost☢️ radioactive element
Vrijeme poluraspada
10 ± 9 ms
spin9/2
nuclear quadrupole moment
datum otkrića2015
parity-

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

224Am

Maseni broj224
broj neutrona129
relative atomic mass
224,046442 ± 0,000429 Da
g-factor
natural abundance
Radioaktivnost☢️ radioactive element
Vrijeme poluraspada
spin
nuclear quadrupole moment
datum otkrića
parity

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

225Am

Maseni broj225
broj neutrona130
relative atomic mass
225,045508 ± 0,000429 Da
g-factor
natural abundance
Radioaktivnost☢️ radioactive element
Vrijeme poluraspada
spin9/2
nuclear quadrupole moment
datum otkrića
parity-

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

226Am

Maseni broj226
broj neutrona131
relative atomic mass
226,04613 ± 0,000322 Da
g-factor
natural abundance
Radioaktivnost☢️ radioactive element
Vrijeme poluraspada
spin
nuclear quadrupole moment
datum otkrića
parity

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

227Am

Maseni broj227
broj neutrona132
relative atomic mass
227,045282 ± 0,000215 Da
g-factor
natural abundance
Radioaktivnost☢️ radioactive element
Vrijeme poluraspada
spin9/2
nuclear quadrupole moment
datum otkrića
parity-

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

228Am

Maseni broj228
broj neutrona133
relative atomic mass
228,046001 ± 0,000215 Da
g-factor
natural abundance
Radioaktivnost☢️ radioactive element
Vrijeme poluraspada
spin
nuclear quadrupole moment
datum otkrića
parity

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

229Am

Maseni broj229
broj neutrona134
relative atomic mass
229,045282534 ± 0,000114169 Da
g-factor
natural abundance
Radioaktivnost☢️ radioactive element
Vrijeme poluraspada
1,8 ± 1,5 s
spin5/2
nuclear quadrupole moment
datum otkrića2015
parity-

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

230Am

Maseni broj230
broj neutrona135
relative atomic mass
230,046025 ± 0,000153 Da
g-factor
natural abundance
Radioaktivnost☢️ radioactive element
Vrijeme poluraspada
40 ± 9 s
spin1
nuclear quadrupole moment
datum otkrića2003
parity-

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

231Am

Maseni broj231
broj neutrona136
relative atomic mass
231,045529 ± 0,000322 Da
g-factor
natural abundance
Radioaktivnost☢️ radioactive element
Vrijeme poluraspada
spin5/2
nuclear quadrupole moment
datum otkrića
parity-

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

232Am

Maseni broj232
broj neutrona137
relative atomic mass
232,046613 ± 0,000322 Da
g-factor
natural abundance
Radioaktivnost☢️ radioactive element
Vrijeme poluraspada
1,31 ± 0,04 m
spin1
nuclear quadrupole moment
datum otkrića1967
parity-

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

233Am

Maseni broj233
broj neutrona138
relative atomic mass
233,046468 ± 0,000123 Da
g-factor
natural abundance
Radioaktivnost☢️ radioactive element
Vrijeme poluraspada
3,2 ± 0,8 m
spin5/2
nuclear quadrupole moment
datum otkrića2000
parity-

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

234Am

Maseni broj234
broj neutrona139
relative atomic mass
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
datum otkrića1967
parity-

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

235Am

Maseni broj235
broj neutrona140
relative atomic mass
235,047906478 ± 0,000056661 Da
g-factor
natural abundance
Radioaktivnost☢️ radioactive element
Vrijeme poluraspada
10,3 ± 0,6 m
spin5/2
nuclear quadrupole moment
datum otkrića1996
parity-

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

236Am

Maseni broj236
broj neutrona141
relative atomic mass
236,049427 ± 0,000127 Da
g-factor
natural abundance
Radioaktivnost☢️ radioactive element
Vrijeme poluraspada
3,6 ± 0,1 m
spin5
nuclear quadrupole moment
datum otkrića1998
parity-

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

237Am

Maseni broj237
broj neutrona142
relative atomic mass
237,049995 ± 0,000064 Da
g-factor
natural abundance
Radioaktivnost☢️ radioactive element
Vrijeme poluraspada
73,6 ± 0,8 m
spin5/2
nuclear quadrupole moment
datum otkrića1970
parity-

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

238Am

Maseni broj238
broj neutrona143
relative atomic mass
238,051982531 ± 0,000063243 Da
g-factor
natural abundance
Radioaktivnost☢️ radioactive element
Vrijeme poluraspada
98 ± 3 m
spin1
nuclear quadrupole moment
datum otkrića1950
parity+

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

239Am

Maseni broj239
broj neutrona144
relative atomic mass
239,053022729 ± 0,000002127 Da
g-factor
natural abundance
Radioaktivnost☢️ radioactive element
Vrijeme poluraspada
11,9 ± 0,1 h
spin5/2
nuclear quadrupole moment
datum otkrića1949
parity-

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

240Am

Maseni broj240
broj neutrona145
relative atomic mass
240,055298374 ± 0,000014849 Da
g-factor
natural abundance
Radioaktivnost☢️ radioactive element
Vrijeme poluraspada
50,8 ± 0,3 h
spin3
nuclear quadrupole moment
datum otkrića1949
parity-

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

241Am

Maseni broj241
broj neutrona146
relative atomic mass
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
datum otkrića1949
parity-

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

242Am

Maseni broj242
broj neutrona147
relative atomic mass
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
datum otkrića1949
parity-

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

243Am

Maseni broj243
broj neutrona148
relative atomic mass
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
datum otkrića1950
parity-

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

244Am

Maseni broj244
broj neutrona149
relative atomic mass
244,064282892 ± 0,0000016 Da
g-factor
natural abundance
Radioaktivnost☢️ radioactive element
Vrijeme poluraspada
10,01 ± 0,03 h
spin6
nuclear quadrupole moment
datum otkrića1950
parity-

decay modeintensity
β (β decay)100%

245Am

Maseni broj245
broj neutrona150
relative atomic mass
245,066452827 ± 0,000002024 Da
g-factor
natural abundance
Radioaktivnost☢️ radioactive element
Vrijeme poluraspada
2,05 ± 0,01 h
spin5/2
nuclear quadrupole moment
datum otkrića1955
parity+

decay modeintensity
β (β decay)100%

246Am

Maseni broj246
broj neutrona151
relative atomic mass
246,069774 ± 0,000019 Da
g-factor
natural abundance
Radioaktivnost☢️ radioactive element
Vrijeme poluraspada
39 ± 3 m
spin7
nuclear quadrupole moment
datum otkrića1955
parity-

decay modeintensity
β (β decay)100%

247Am

Maseni broj247
broj neutrona152
relative atomic mass
247,072092 ± 0,000107 Da
g-factor
natural abundance
Radioaktivnost☢️ radioactive element
Vrijeme poluraspada
23 ± 1,3 m
spin5/2
nuclear quadrupole moment
datum otkrića1967
parity

decay modeintensity
β (β decay)100%

248Am

Maseni broj248
broj neutrona153
relative atomic mass
248,075752 ± 0,000215 Da
g-factor
natural abundance
Radioaktivnost☢️ radioactive element
Vrijeme poluraspada
spin3
nuclear quadrupole moment
datum otkrića
parity+

decay modeintensity
β (β decay)

249Am

Maseni broj249
broj neutrona154
relative atomic mass
249,07848 ± 0,00032 Da
g-factor
natural abundance
Radioaktivnost☢️ radioactive element
Vrijeme poluraspada
spin5/2
nuclear quadrupole moment
datum otkrića
parity

decay modeintensity
β (β decay)
Americium microscope

historija

otkrivač ili izumiteljG.T.Seaborg, R.A.James, L.O.Morgan, A.Ghiorso
mjesto otkrićaUnited States
datum otkrića1945
EtimologijaNamed for the American continent, by analogy with europium.
pronunciationam-er-ISH-i-em (engleski)

izvor

Abundance
Abundance in Earth's crust
natural abundance (okean)
natural abundance (ljudsko tijelo)
0 %
natural abundance (Meteoroidi)
0 %
natural abundance (Sunce)
0 %
Abundance in Universe
0 %

Nuclear Screening Constants