Америций

Америций (Am)

chemical element with the atomic number of 95
Atomic Number95
Atomic Weight243
mass number223
Group
Period7
Blockf
Протон95 p+
Нейтрон128 n0
Электрон95 e-
Animated Bohr model of Am (Америций)

Physical Property

Атомдук Радиус
molar volume
covalent radius
Metallic Radius
ionic radius
Crystal Radius
Van der Waals radius
density
Atomic Radii Of The Elements: Америций0102030405060708090100110120130140150160170180190200210220230240250pmАтомдук РадиусCovalent RadiusMetallic RadiusVan der Waals radius

Chemical Property

энергия
proton affinity
electron affinity
ionization energy
ionization energy of Am (Америций)
enthalpy of vaporization
enthalpy of fusion
standard enthalpy of formation
Электрон
electron shell2, 8, 18, 32, 25, 8, 2
Bohr model: Am (Америций)
valence electron2
Lewis structure: Am (Америций)
electron configuration[Rn] 5f7 7s2
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f14 5d10 6p6 5f7 7s2
Enhanced Bohr model of Am (Америций)
Orbital Diagram of Am (Америций)
oxidation number2, 3, 4, 5, 6, 7
electronegativity
Electrophilicity Index
fundamental state of matter
phase of matterSolid
gaseous state of matter
Boiling Point
Melting Point
critical pressure
critical temperature
triple point
appearance
Түс –
Silver
appearancesilvery white
refractive index
thermodynamic material property
Thermal Conductivity
thermal expansion
molar heat capacity
Specific Heat Capacity
heat capacity ratio
electrical properties
type
electrical conductivity
electrical resistivity
superconductivity
Магнетизм
typeparamagnetic
magnetic susceptibility (Mass)
0,0000000515 m³/Kg
magnetic susceptibility (Molar)
0,00000001251 m³/mol
magnetic susceptibility (Volume)
0,000704
magnetic ordering
Curie temperature
Néel temperature
түзүм
Crystal StructureSimple Hexagonal ()
lattice constant
Lattice Anglesπ/2, π/2, 2 π/3
mechanical property
hardness
bulk modulus
shear modulus
Young's modulus
Poisson's ratio
speed of sound
classification
CategoryActinides, Actinides
CAS Group
IUPAC Group
Glawe Number39
Mendeleev Number26
Pettifor Number42
Geochemical Class
Литофиль элементтериsynthetic

other

Gas Basicity
polarizability
C6 Dispersion Coefficient
allotrope
Neutron cross section
74
Neutron Mass Absorption
Кванттык сандар8S7/2
space group194 (P63/mmc)

Isotopes of Americium

Stable Isotopes0
Unstable Isotopes27
Natural Isotopes0

223Am

mass number223
neutron number128
Relative Atomic Mass
g-factor
natural abundance
Радиоактивдүүлүк☢️ Радиоактивдүү элементтер —
half-life
10 ± 9 ms
Спин9/2
nuclear quadrupole moment
time of discovery or invention2015
parity-

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

224Am

mass number224
neutron number129
Relative Atomic Mass
g-factor
natural abundance
Радиоактивдүүлүк☢️ Радиоактивдүү элементтер —
half-life
Спин
nuclear quadrupole moment
time of discovery or invention
parity

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

225Am

mass number225
neutron number130
Relative Atomic Mass
g-factor
natural abundance
Радиоактивдүүлүк☢️ Радиоактивдүү элементтер —
half-life
Спин9/2
nuclear quadrupole moment
time of discovery or invention
parity-

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

226Am

mass number226
neutron number131
Relative Atomic Mass
g-factor
natural abundance
Радиоактивдүүлүк☢️ Радиоактивдүү элементтер —
half-life
Спин
nuclear quadrupole moment
time of discovery or invention
parity

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

227Am

mass number227
neutron number132
Relative Atomic Mass
g-factor
natural abundance
Радиоактивдүүлүк☢️ Радиоактивдүү элементтер —
half-life
Спин9/2
nuclear quadrupole moment
time of discovery or invention
parity-

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

228Am

mass number228
neutron number133
Relative Atomic Mass
g-factor
natural abundance
Радиоактивдүүлүк☢️ Радиоактивдүү элементтер —
half-life
Спин
nuclear quadrupole moment
time of discovery or invention
parity

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

229Am

mass number229
neutron number134
Relative Atomic Mass
g-factor
natural abundance
Радиоактивдүүлүк☢️ Радиоактивдүү элементтер —
half-life
1,8 ± 1,5 s
Спин5/2
nuclear quadrupole moment
time of discovery or invention2015
parity-

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

230Am

mass number230
neutron number135
Relative Atomic Mass
g-factor
natural abundance
Радиоактивдүүлүк☢️ Радиоактивдүү элементтер —
half-life
40 ± 9 s
Спин1
nuclear quadrupole moment
time of discovery or invention2003
parity-

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

231Am

mass number231
neutron number136
Relative Atomic Mass
g-factor
natural abundance
Радиоактивдүүлүк☢️ Радиоактивдүү элементтер —
half-life
Спин5/2
nuclear quadrupole moment
time of discovery or invention
parity-

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

232Am

mass number232
neutron number137
Relative Atomic Mass
g-factor
natural abundance
Радиоактивдүүлүк☢️ Радиоактивдүү элементтер —
half-life
1,31 ± 0,04 m
Спин1
nuclear quadrupole moment
time of discovery or invention1967
parity-

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

233Am

mass number233
neutron number138
Relative Atomic Mass
g-factor
natural abundance
Радиоактивдүүлүк☢️ Радиоактивдүү элементтер —
half-life
3,2 ± 0,8 m
Спин5/2
nuclear quadrupole moment
time of discovery or invention2000
parity-

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

234Am

mass number234
neutron number139
Relative Atomic Mass
g-factor
0
natural abundance
Радиоактивдүүлүк☢️ Радиоактивдүү элементтер —
half-life
2,32 ± 0,08 m
Спин0
nuclear quadrupole moment
0
time of discovery or invention1967
parity-

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

235Am

mass number235
neutron number140
Relative Atomic Mass
g-factor
natural abundance
Радиоактивдүүлүк☢️ Радиоактивдүү элементтер —
half-life
10,3 ± 0,6 m
Спин5/2
nuclear quadrupole moment
time of discovery or invention1996
parity-

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

236Am

mass number236
neutron number141
Relative Atomic Mass
g-factor
natural abundance
Радиоактивдүүлүк☢️ Радиоактивдүү элементтер —
half-life
3,6 ± 0,1 m
Спин5
nuclear quadrupole moment
time of discovery or invention1998
parity-

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

237Am

mass number237
neutron number142
Relative Atomic Mass
g-factor
natural abundance
Радиоактивдүүлүк☢️ Радиоактивдүү элементтер —
half-life
73,6 ± 0,8 m
Спин5/2
nuclear quadrupole moment
time of discovery or invention1970
parity-

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

238Am

mass number238
neutron number143
Relative Atomic Mass
g-factor
natural abundance
Радиоактивдүүлүк☢️ Радиоактивдүү элементтер —
half-life
98 ± 3 m
Спин1
nuclear quadrupole moment
time of discovery or invention1950
parity+

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

239Am

mass number239
neutron number144
Relative Atomic Mass
g-factor
natural abundance
Радиоактивдүүлүк☢️ Радиоактивдүү элементтер —
half-life
11,9 ± 0,1 h
Спин5/2
nuclear quadrupole moment
time of discovery or invention1949
parity-

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

240Am

mass number240
neutron number145
Relative Atomic Mass
g-factor
natural abundance
Радиоактивдүүлүк☢️ Радиоактивдүү элементтер —
half-life
50,8 ± 0,3 h
Спин3
nuclear quadrupole moment
time of discovery or invention1949
parity-

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

241Am

mass number241
neutron number146
Relative Atomic Mass
g-factor
0,64 ± 0,004
natural abundance
Радиоактивдүүлүк☢️ Радиоактивдүү элементтер —
half-life
432,6 ± 0,6 y
Спин5/2
nuclear quadrupole moment
4,34 ± 0,05
time of discovery or invention1949
parity-

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

242Am

mass number242
neutron number147
Relative Atomic Mass
g-factor
0,3854 ± 0,0017
natural abundance
Радиоактивдүүлүк☢️ Радиоактивдүү элементтер —
half-life
16,02 ± 0,02 h
Спин1
nuclear quadrupole moment
-2,4 ± 0,4
time of discovery or invention1949
parity-

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

243Am

mass number243
neutron number148
Relative Atomic Mass
g-factor
0,608 ± 0,004
natural abundance
Радиоактивдүүлүк☢️ Радиоактивдүү элементтер —
half-life
7,35 ± 0,009 ky
Спин5/2
nuclear quadrupole moment
4,32 ± 0,06
time of discovery or invention1950
parity-

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

244Am

mass number244
neutron number149
Relative Atomic Mass
g-factor
natural abundance
Радиоактивдүүлүк☢️ Радиоактивдүү элементтер —
half-life
10,01 ± 0,03 h
Спин6
nuclear quadrupole moment
time of discovery or invention1950
parity-

decay modeintensity
β (β decay)100%

245Am

mass number245
neutron number150
Relative Atomic Mass
g-factor
natural abundance
Радиоактивдүүлүк☢️ Радиоактивдүү элементтер —
half-life
2,05 ± 0,01 h
Спин5/2
nuclear quadrupole moment
time of discovery or invention1955
parity+

decay modeintensity
β (β decay)100%

246Am

mass number246
neutron number151
Relative Atomic Mass
g-factor
natural abundance
Радиоактивдүүлүк☢️ Радиоактивдүү элементтер —
half-life
39 ± 3 m
Спин7
nuclear quadrupole moment
time of discovery or invention1955
parity-

decay modeintensity
β (β decay)100%

247Am

mass number247
neutron number152
Relative Atomic Mass
g-factor
natural abundance
Радиоактивдүүлүк☢️ Радиоактивдүү элементтер —
half-life
23 ± 1,3 m
Спин5/2
nuclear quadrupole moment
time of discovery or invention1967
parity

decay modeintensity
β (β decay)100%

248Am

mass number248
neutron number153
Relative Atomic Mass
g-factor
natural abundance
Радиоактивдүүлүк☢️ Радиоактивдүү элементтер —
half-life
Спин3
nuclear quadrupole moment
time of discovery or invention
parity+

decay modeintensity
β (β decay)

249Am

mass number249
neutron number154
Relative Atomic Mass
g-factor
natural abundance
Радиоактивдүүлүк☢️ Радиоактивдүү элементтер —
half-life
Спин5/2
nuclear quadrupole moment
time of discovery or invention
parity

decay modeintensity
β (β decay)
Americium microscope

тарых

discoverer or inventorG.T.Seaborg, R.A.James, L.O.Morgan, A.Ghiorso
location of discoveryUnited States
time of discovery or invention1945
ЭтимологияNamed for the American continent, by analogy with europium.
pronunciationam-er-ISH-i-em (англисче)

source

Abundance
Abundance in Earth's crust
natural abundance (Океан)
natural abundance (human body)
0 %
natural abundance (meteoroid)
0 %
natural abundance (Күн)
0 %
Abundance in Universe
0 %

Nuclear Screening Constants