Arsènic

Arsènic (As)

chemical element with symbol As and atomic number 33
Atomic Number33
Atomic Weight74.921595
Rhif màs75
Group15
Period4
Blockp
Proton33 p+
Niwtron42 n0
Electron33 e-
Animated Bohr model of As (Arsènic)

Nodwedd Ffisegol

Atomic Radius
115 pm
molar volume
covalent radius
121 pm
Metallic Radius
121 pm
ionic radius
58 pm
Crystal Radius
72 pm
Van der Waals radius
185 pm
density
5.75 g/cm³
Atomic Radii Of The Elements: Arsènic0102030405060708090100110120130140150160170180190pmAtomic RadiusCovalent RadiusMetallic RadiusVan der Waals radius

Nodwedd Gemegol

egni
proton affinity
electron affinity
ionization energy
ionization energy of As (Arsènic)
enthalpy of vaporization
32.4 kJ/mol
enthalpy of fusion
standard enthalpy of formation
302.5 kJ/mol
Electron
plisgyn yr electron2, 8, 18, 5
Bohr model: As (Arsènic)
valence electron5
Lewis structure: As (Arsènic)
trefn yr electronnau[Ar] 3d10 4s2 4p3
1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p3
Enhanced Bohr model of As (Arsènic)
Orbital Diagram of As (Arsènic)
Cyflwr ocsidiad-3, -2, -1, 0, 1, 2, 3, 4, 5
Electronegatifedd
2.18
Electrophilicity Index
1.5610969532554257 eV/particle
cyflwr sylfaenol mater
cyflwr materSolid
gaseous state of matter
Boiling Point
889.15 K
Melting Point
1,090.15 K
critical pressure
22.3 MPa
critical temperature
1,673.15 K
triple point
1,090.15 K
3,700 kPa
appearance
lliw
Silver
appearancemetallic grey
Mynegrif plygiant
1.001552
nodwedd ffisegol gwrthrych
Thermal Conductivity
thermal expansion
molar heat capacity
24.64 J/(mol K)
Specific Heat Capacity
0.329 J/(g⋅K)
heat capacity ratio
electrical properties
typeConductor
dargludedd trydanol
3.3 MS/m
Gwrthedd
0.0000003 m Ω
superconductivity
magnetism
typediamagnetic
magnetic susceptibility (Mass)
-0.0000000039 m³/Kg
magnetic susceptibility (Molar)
-0.000000000292 m³/mol
magnetic susceptibility (Volume)
-0.0000223
magnetic ordering
Curie temperature
Néel temperature
strwythur
Crystal StructureSimple Trigonal (RHL)
lattice constant
4.13 Å
Lattice Anglesπ/2, π/2, 2 π/3
nodwedd mecanyddol deunyddiau
hardness
3.5 MPa
bulk modulus
22 GPa
shear modulus
Young's modulus
8 GPa
Poisson's ratio
speed of sound
classification
CategoryMetalloids, Metalloids
CAS GroupVB
IUPAC GroupVA
Glawe Number90
Mendeleev Number95
Pettifor Number89
Geochemical Classsemi-volatile
Goldschmidt classificationchalcophile

other

Gas Basicity
polarizability
30 ± 1 a₀
C6 Dispersion Coefficient
246 a₀
allotropeYellow Arsenic, Black Arsenic, Gray Arsenic
Neutron cross section
4.2
Neutron Mass Absorption
0.002
quantum number4S3/2
space group166 (R_3m)

Isotopes of Arsenic

Stable Isotopes1
Unstable Isotopes32
Natural Isotopes1

60As

Rhif màs60
neutron number27
relative atomic mass
59.993945 ± 0.000429 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
spin5
nuclear quadrupole moment
dyddiad darganfod
parity+

decay modeintensity
p (proton emission)

61As

Rhif màs61
neutron number28
relative atomic mass
60.981535 ± 0.000322 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
spin3/2
nuclear quadrupole moment
dyddiad darganfod
parity-

decay modeintensity
p (proton emission)

62As

Rhif màs62
neutron number29
relative atomic mass
61.973784 ± 0.000322 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
spin1
nuclear quadrupole moment
dyddiad darganfod
parity+

decay modeintensity
p (proton emission)

63As

Rhif màs63
neutron number30
relative atomic mass
62.964036 ± 0.000215 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
spin3/2
nuclear quadrupole moment
dyddiad darganfod
parity-

decay modeintensity
p (proton emission)

64As

Rhif màs64
neutron number31
relative atomic mass
63.95756 ± 0.000218 Da
g-factor
0
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
69 ± 1.4 ms
spin0
nuclear quadrupole moment
0
dyddiad darganfod1995
parity+

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%
β+ p (β+-delayed proton emission)

65As

Rhif màs65
neutron number32
relative atomic mass
64.949611 ± 0.000091 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
130.3 ± 0.6 ms
spin3/2
nuclear quadrupole moment
dyddiad darganfod1991
parity-

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%
β+ p (β+-delayed proton emission)

66As

Rhif màs66
neutron number33
relative atomic mass
65.944148778 ± 0.0000061 Da
g-factor
0
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
95.77 ± 0.23 ms
spin0
nuclear quadrupole moment
0
dyddiad darganfod1978
parity+

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

67As

Rhif màs67
neutron number34
relative atomic mass
66.93925111 ± 0.000000475 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
42.5 ± 1.2 s
spin5/2
nuclear quadrupole moment
dyddiad darganfod1980
parity-

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

68As

Rhif màs68
neutron number35
relative atomic mass
67.936774127 ± 0.000001981 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
151.6 ± 0.8 s
spin3
nuclear quadrupole moment
dyddiad darganfod1971
parity+

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

69As

Rhif màs69
neutron number36
relative atomic mass
68.932246289 ± 0.000034352 Da
g-factor
0.6488 ± 0.0008
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
15.2 ± 0.2 m
spin5/2
nuclear quadrupole moment
dyddiad darganfod1955
parity-

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

70As

Rhif màs70
neutron number37
relative atomic mass
69.930934642 ± 0.0000015 Da
g-factor
0.5276 ± 0.000125
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
52.6 ± 0.3 m
spin4
nuclear quadrupole moment
0.09 ± 0.02
dyddiad darganfod1950
parity+

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

71As

Rhif màs71
neutron number38
relative atomic mass
70.927113594 ± 0.000004469 Da
g-factor
0.6692 ± 0.0008
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
65.3 ± 0.07 h
spin5/2
nuclear quadrupole moment
-0.021 ± 0.006
dyddiad darganfod1939
parity-

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

72As

Rhif màs72
neutron number39
relative atomic mass
71.926752291 ± 0.000004383 Da
g-factor
-1.0805 ± 0.0003
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
26 ± 0.1 h
spin2
nuclear quadrupole moment
-0.08 ± 0.02
dyddiad darganfod1939
parity-

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

73As

Rhif màs73
neutron number40
relative atomic mass
72.923829086 ± 0.000004136 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
80.3 ± 0.06 d
spin3/2
nuclear quadrupole moment
dyddiad darganfod1948
parity-

decay modeintensity
ϵ (electron capture)100%

74As

Rhif màs74
neutron number41
relative atomic mass
73.923928596 ± 0.000001817 Da
g-factor
-0.798 ± 0.0015
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
17.77 ± 0.02 d
spin2
nuclear quadrupole moment
dyddiad darganfod1938
parity-

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)66%
β (β decay)34%

75As

Rhif màs75
neutron number42
relative atomic mass
74.921594562 ± 0.000000948 Da
g-factor
natural abundance
100
Dadfeilio ymbelydrolstable isotope
Hanner oesNot Radioactive ☢️
spin3/2
nuclear quadrupole moment
0.311 ± 0.002
dyddiad darganfod1920
parity-

76As

Rhif màs76
neutron number43
relative atomic mass
75.922392011 ± 0.000000951 Da
g-factor
0.45115 ± 0.0005
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
1.0933 ± 0.0038 d
spin2
nuclear quadrupole moment
dyddiad darganfod1934
parity-

decay modeintensity
β (β decay)100%

77As

Rhif màs77
neutron number44
relative atomic mass
76.920647555 ± 0.000001816 Da
g-factor
0.86266666666667 ± 0.00086666666666667
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
38.79 ± 0.05 h
spin3/2
nuclear quadrupole moment
dyddiad darganfod1951
parity-

decay modeintensity
β (β decay)100%

78As

Rhif màs78
neutron number45
relative atomic mass
77.921827771 ± 0.000010498 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
90.7 ± 0.2 m
spin2
nuclear quadrupole moment
dyddiad darganfod1937
parity-

decay modeintensity
β (β decay)100%

79As

Rhif màs79
neutron number46
relative atomic mass
78.920948419 ± 0.000005716 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
9.01 ± 0.15 m
spin3/2
nuclear quadrupole moment
dyddiad darganfod1950
parity-

decay modeintensity
β (β decay)100%

80As

Rhif màs80
neutron number47
relative atomic mass
79.92247444 ± 0.000003578 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
15.2 ± 0.2 s
spin1
nuclear quadrupole moment
dyddiad darganfod1954
parity+

decay modeintensity
β (β decay)100%

81As

Rhif màs81
neutron number48
relative atomic mass
80.922132288 ± 0.000002838 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
33.3 ± 0.8 s
spin3/2
nuclear quadrupole moment
dyddiad darganfod1960
parity-

decay modeintensity
β (β decay)100%

82As

Rhif màs82
neutron number49
relative atomic mass
81.924738731 ± 0.000004003 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
19.1 ± 0.5 s
spin2
nuclear quadrupole moment
dyddiad darganfod1968
parity-

decay modeintensity
β (β decay)100%

83As

Rhif màs83
neutron number50
relative atomic mass
82.9252069 ± 0.000003004 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
13.4 ± 0.4 s
spin5/2
nuclear quadrupole moment
dyddiad darganfod1968
parity-

decay modeintensity
β (β decay)100%

84As

Rhif màs84
neutron number51
relative atomic mass
83.92930329 ± 0.000003403 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
3.16 ± 0.58 s
spin2
nuclear quadrupole moment
dyddiad darganfod1968
parity-

decay modeintensity
β (β decay)100%
β n (β-delayed neutron emission)0.28%

85As

Rhif màs85
neutron number52
relative atomic mass
84.932163658 ± 0.000003304 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
2.022 ± 0.007 s
spin5/2
nuclear quadrupole moment
dyddiad darganfod1967
parity-

decay modeintensity
β (β decay)100%
β n (β-delayed neutron emission)62.6%

86As

Rhif màs86
neutron number53
relative atomic mass
85.936701532 ± 0.000003703 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
945 ± 8 ms
spin1
nuclear quadrupole moment
dyddiad darganfod1973
parity-

decay modeintensity
β (β decay)100%
β n (β-delayed neutron emission)35.5%
2n (2-neutron emission)

87As

Rhif màs87
neutron number54
relative atomic mass
86.940291716 ± 0.000003204 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
492 ± 25 ms
spin5/2
nuclear quadrupole moment
dyddiad darganfod1970
parity-

decay modeintensity
β (β decay)100%
β n (β-delayed neutron emission)15.4%
2n (2-neutron emission)

88As

Rhif màs88
neutron number55
relative atomic mass
87.94584 ± 0.000215 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
270 ± 150 ms
spin
nuclear quadrupole moment
dyddiad darganfod1994
parity

decay modeintensity
β (β decay)100%
β n (β-delayed neutron emission)

89As

Rhif màs89
neutron number56
relative atomic mass
88.950048 ± 0.000322 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
spin5/2
nuclear quadrupole moment
dyddiad darganfod1994
parity-

decay modeintensity
β (β decay)
β n (β-delayed neutron emission)
2n (2-neutron emission)

90As

Rhif màs90
neutron number57
relative atomic mass
89.955995 ± 0.000429 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
spin
nuclear quadrupole moment
dyddiad darganfod1997
parity

decay modeintensity
β (β decay)
β n (β-delayed neutron emission)
2n (2-neutron emission)

91As

Rhif màs91
neutron number58
relative atomic mass
90.960816 ± 0.000429 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
spin5/2
nuclear quadrupole moment
dyddiad darganfod1997
parity-

decay modeintensity
β (β decay)
β n (β-delayed neutron emission)
2n (2-neutron emission)

92As

Rhif màs92
neutron number59
relative atomic mass
91.967386 ± 0.000537 Da
g-factor
natural abundance
Dadfeilio ymbelydrol☢️ elfen ymbelydrol
Hanner oes
spin
nuclear quadrupole moment
dyddiad darganfod1997
parity

decay modeintensity
β (β decay)
β n (β-delayed neutron emission)
2n (2-neutron emission)
Arsen 1

hanes

darganfyddwr neu ddyfeisiwrKnown to the ancients.
man darganfod
dyddiad darganfod
geirdarddiadGreek: arsenikon; Latin: arsenicum, (both names for yellow pigment).
ynganiadAR-s'n-ik (Saesneg)

source

Abundance
Abundance in Earth's crust
1.8 mg/kg
natural abundance (cefnfor)
0.0037 mg/L
natural abundance (corff dynol)
0.000005 %
natural abundance (Awyrfaen)
0.00018 %
natural abundance (Haul)
Abundance in Universe
0.0000008 %

Nuclear Screening Constants

1s0.7217
2p3.9264
2s8.873
3d15.6216
3p15.1503
3s14.4045
4p25.5508
4s24.056