Helioa

Helioa (He)

2 zenbaki atomikoa duen elementu kimikoa
Atomic Number2
Atomic Weight4.002602
masa-zenbaki4
Group18
Period1
Blocks
protoi2 p+
neutroi2 n0
elektroi2 e-
Animated Bohrren eredu atomikoa of He (Helioa)

Propietate Fisiko

Erradio Atomiko
120 pm
bolumen molar
Erradio Kobalente
46 pm
Metallic Radius
Erradio ioniko
Crystal Radius
Van der Waalsen erradio
140 pm
dentsitatea
0,000164 g/cm³
Atomic Radii Of The Elements: Helioa0102030405060708090100110120130140pmErradio AtomikoErradio KobalenteMetallic RadiusVan der Waalsen erradio

Magnitude Fisiko

energia
proton affinity
177,8 kJ/mol
Afinitate elektroniko
−19,7 eV/particle
ionizazio energia
24,587387936 eV/particle
ionizazio energia of He (Helioa)
Irakite-entalpia
0,08 kJ/mol
urtze-entalpia
formazio entalpia estandarra
elektroi
elektroi geruza2
Bohrren eredu atomikoa: He (Helioa)
balentzia-elektroi2
Lewis egitura: He (Helioa)
electron configuration1s2
Enhanced Bohrren eredu atomikoa of He (Helioa)
Orbital Diagram of He (Helioa)
Oxidazio-egoera
Elektronegatibotasun
Electrophilicity Index
0,0674191963846371 eV/particle
materiaren funtsezko egoera
materiaren egoeraGas
materiaren egoera gaseosoMonoatomic
Boiling Point
4,222 K
Melting Point
critical pressure
0,22746 MPa
critical temperature
5,195 K
Puntu hirukoitz
2,177 K
5,043 kPa
appearance
kolore
Colorless
appearancecolorless gas, exhibiting a red-orange glow when placed in a high-voltage electric field
errefrakzio-indize
1,000035
thermodynamic material property
Thermal Conductivity
0,152 W/(m K)
Bero-dilatazio
molar heat capacity
20,786 J/(mol K)
Specific Heat Capacity
5,193 J/(g⋅K)
indize adiabatiko5/3
electrical properties
type
Eroankortasun elektriko
Erresistibitate elektriko
Supereroankortasun
Magnetismo
typediamagnetic
suszeptibilitate magnetiko (Mass)
−0,0000000059 m³/Kg
suszeptibilitate magnetiko (Molar)
−0,0000000000236 m³/mol
suszeptibilitate magnetiko (Volume)
−0,00000000105
magnetic ordering
Curieren tenperatura
Néel temperature
egitura
Crystal StructureFace Centered Cubic (HEX)
lattice constant
3,57 Å
Lattice Anglesπ/2, π/2, π/2
materialen propietate mekaniko
Gogortasun
konprimagarritasun-modulu
Zizaila modulua
Youngen modulu
Poissonen modulu
Soinuaren lastertasun
970 m/s
classification
CategoryNoble gases, Noble gases
CAS GroupVIII
IUPAC GroupVIIIA
Glawe Number1
Mendeleev Number112
Pettifor Number1
Geochemical Classvolatile
Goldschmidt classificationatmophile

beste batzuk

Gas Basicity
148,5 kJ/mol
polarizability
1,38375 ± 0,00002 a₀
C6 Dispersion Coefficient
1,42 a₀
allotrope
Neutron cross section
0,007
Neutron Mass Absorption
0,00001
zenbaki kuantiko1S0
talde espazial225 (Fm_3m)

Isotopes of Helium

Stable Isotopes2
Unstable Isotopes6
Natural Isotopes2
Isotopic Composition4100.00%4100.00%30.00%30.00%

3He

masa-zenbaki3
neutron number1
atomo-masa erlatibo
3,01602932197 ± 0,00000000006 Da
g-factor
−4,25525062 ± 0,00000006
natural abundance
0,0002 ± 0,0002
desintegrazio erradioaktiboisotopo egonkor
Semidesintegrazio-periodoNot Radioactive ☢️
spin1/2
nuclear quadrupole moment
0
aurkikuntza-data1934
parity+

4He

masa-zenbaki4
neutron number2
atomo-masa erlatibo
4,00260325413 ± 0,00000000016 Da
g-factor
0
natural abundance
99,9998 ± 0,0002
desintegrazio erradioaktiboisotopo egonkor
Semidesintegrazio-periodoNot Radioactive ☢️
spin0
nuclear quadrupole moment
0
aurkikuntza-data1908
parity+

5He

masa-zenbaki5
neutron number3
atomo-masa erlatibo
5,012057224 ± 0,00002147 Da
g-factor
natural abundance
desintegrazio erradioaktibo☢️ radioactive element
Semidesintegrazio-periodo
602 ± 22 ys
spin3/2
nuclear quadrupole moment
aurkikuntza-data1937
parity-

decay modeintensity
n (neutron emission)100%

6He

masa-zenbaki6
neutron number4
atomo-masa erlatibo
6,018885889 ± 0,000000057 Da
g-factor
0
natural abundance
desintegrazio erradioaktibo☢️ radioactive element
Semidesintegrazio-periodo
806,92 ± 0,24 ms
spin0
nuclear quadrupole moment
0
aurkikuntza-data1936
parity+

decay modeintensity
β (β decay)100%
β d (β-delayed deuteron emission)0.000278%

7He

masa-zenbaki7
neutron number5
atomo-masa erlatibo
7,027990652 ± 0,000008115 Da
g-factor
natural abundance
desintegrazio erradioaktibo☢️ radioactive element
Semidesintegrazio-periodo
2,51 ± 0,07 zs
spin3/2
nuclear quadrupole moment
aurkikuntza-data1967
parity

decay modeintensity
n (neutron emission)100%

8He

masa-zenbaki8
neutron number6
atomo-masa erlatibo
8,033934388 ± 0,000000095 Da
g-factor
0
natural abundance
desintegrazio erradioaktibo☢️ radioactive element
Semidesintegrazio-periodo
119,5 ± 1,5 ms
spin0
nuclear quadrupole moment
0
aurkikuntza-data1965
parity+

decay modeintensity
β (β decay)100%
β n (β-delayed neutron emission)16%
β t (β-delayed triton emission)0.9%

9He

masa-zenbaki9
neutron number7
atomo-masa erlatibo
9,043946414 ± 0,000050259 Da
g-factor
natural abundance
desintegrazio erradioaktibo☢️ radioactive element
Semidesintegrazio-periodo
2,5 ± 2,3 zs
spin1/2
nuclear quadrupole moment
0
aurkikuntza-data1987
parity

decay modeintensity
n (neutron emission)100%

10He

masa-zenbaki10
neutron number8
atomo-masa erlatibo
10,052815306 ± 0,000099676 Da
g-factor
0
natural abundance
desintegrazio erradioaktibo☢️ radioactive element
Semidesintegrazio-periodo
260 ± 40 ys
spin0
nuclear quadrupole moment
0
aurkikuntza-data1994
parity+

decay modeintensity
2n (2-neutron emission)100%
Helium discharge tube

historia

aurkitzailea edo asmatzaileaSir William Ramsey, Nils Langet, P.T.Cleve
aurkikuntzaren lekuaScotland/Sweden
aurkikuntza-data1895
etimologiaGreek: hêlios (sun).
pronunciationHEE-li-em (ingelesa)

source

Abundance
Abundance in Earth's crust
0,008 mg/kg
natural abundance (ozeano)
0,000007 mg/L
natural abundance (gizakiaren gorputza)
natural abundance (Meteoroide)
natural abundance (Eguzkia)
23 %
Abundance in Universe
23 %

Nuclear Screening Constants

1s0.3125