Atomic Number | 2 |
---|---|
Atomic Weight | 4.002602 |
mass number | 4 |
Group | 18 |
---|---|
Period | 1 |
Block | s |
پروتون | 2 p+ |
---|---|
neutron | 2 n0 |
ئېلېكترون | 2 e- |
Atomic Radius | |
---|---|
molar volume | |
covalent radius | |
Metallic Radius | |
ionic radius | |
Crystal Radius | |
Van der Waals radius | |
density |
ئېنېرگىيە | |
---|---|
proton affinity | |
electron affinity | |
ionization energy | |
enthalpy of vaporization | |
enthalpy of fusion | |
standard enthalpy of formation | |
ئېلېكترون | |
ئېلېكترون قەۋەت | 2 |
valence electron | 2 ⓘ |
electron configuration | 1s2ⓘ |
oxidation number | |
electronegativity | |
Electrophilicity Index | |
fundamental state of matter | |
phase of matter | Gas |
gaseous state of matter | Monoatomic |
Boiling Point | |
Melting Point | |
critical pressure | |
critical temperature | |
triple point | |
appearance | |
color | Colorless
|
appearance | colorless gas, exhibiting a red-orange glow when placed in a high-voltage electric field |
refractive index | 1.000035
|
thermodynamic material property | |
Thermal Conductivity | |
thermal expansion | |
molar heat capacity | |
Specific Heat Capacity | |
heat capacity ratio | 5/3 |
electrical properties | |
type | |
electrical conductivity | |
electrical resistivity | |
superconductivity | |
magnetism | |
type | diamagnetic |
magnetic susceptibility (Mass) | -0.0000000059 m³/Kg
|
magnetic susceptibility (Molar) | -0.0000000000236 m³/mol
|
magnetic susceptibility (Volume) | -0.00000000105
|
magnetic ordering | |
Curie temperature | |
Néel temperature | |
structure | |
Crystal Structure | Face Centered Cubic (HEX) |
lattice constant | |
Lattice Angles | π/2, π/2, π/2 |
mechanical property | |
hardness | |
bulk modulus | |
shear modulus | |
Young's modulus | |
Poisson's ratio | |
speed of sound | |
classification | |
Category | Noble gases, Noble gases |
CAS Group | VIII |
IUPAC Group | VIIIA |
Glawe Number | 1 |
Mendeleev Number | 112 |
Pettifor Number | 1 |
Geochemical Class | volatile |
Goldschmidt classification | atmophile |
Gas Basicity | |
---|---|
polarizability | |
C6 Dispersion Coefficient | |
allotrope | |
Neutron cross section | 0.007
|
Neutron Mass Absorption | 0.00001
|
quantum number | 1S0 |
space group | 225 (Fm_3m) |
Stable Isotopes | 2 |
---|---|
Unstable Isotopes | 6 |
Natural Isotopes | 2 |
mass number | 3 |
---|---|
neutron number | 1 |
Relative Atomic Mass | |
g-factor | -4.25525062 ± 0.00000006
|
natural abundance | 0.0002 ± 0.0002
|
radioactivity | stable isotope |
half-life | Not Radioactive ☢️ |
spin | 1/2 |
nuclear quadrupole moment | 0
|
time of discovery or invention | 1934 |
parity | + |
mass number | 4 |
---|---|
neutron number | 2 |
Relative Atomic Mass | |
g-factor | 0
|
natural abundance | 99.9998 ± 0.0002
|
radioactivity | stable isotope |
half-life | Not Radioactive ☢️ |
spin | 0 |
nuclear quadrupole moment | 0
|
time of discovery or invention | 1908 |
parity | + |
mass number | 5 |
---|---|
neutron number | 3 |
Relative Atomic Mass | |
g-factor | |
natural abundance | |
radioactivity | ☢️ radioactive element |
half-life | 602 ± 22 ys
|
spin | 3/2 |
nuclear quadrupole moment | |
time of discovery or invention | 1937 |
parity | - |
decay mode | intensity |
---|---|
n (neutron emission) | 100% |
mass number | 6 |
---|---|
neutron number | 4 |
Relative Atomic Mass | |
g-factor | 0
|
natural abundance | |
radioactivity | ☢️ radioactive element |
half-life | 806.92 ± 0.24 ms
|
spin | 0 |
nuclear quadrupole moment | 0
|
time of discovery or invention | 1936 |
parity | + |
decay mode | intensity |
---|---|
β− (β− decay) | 100% |
β− d (β−-delayed deuteron emission) | 0.000278% |
mass number | 7 |
---|---|
neutron number | 5 |
Relative Atomic Mass | |
g-factor | |
natural abundance | |
radioactivity | ☢️ radioactive element |
half-life | 2.51 ± 0.07 zs
|
spin | 3/2 |
nuclear quadrupole moment | |
time of discovery or invention | 1967 |
parity |
decay mode | intensity |
---|---|
n (neutron emission) | 100% |
mass number | 8 |
---|---|
neutron number | 6 |
Relative Atomic Mass | |
g-factor | 0
|
natural abundance | |
radioactivity | ☢️ radioactive element |
half-life | 119.5 ± 1.5 ms
|
spin | 0 |
nuclear quadrupole moment | 0
|
time of discovery or invention | 1965 |
parity | + |
decay mode | intensity |
---|---|
β− (β− decay) | 100% |
β− n (β−-delayed neutron emission) | 16% |
β− t (β−-delayed triton emission) | 0.9% |
mass number | 9 |
---|---|
neutron number | 7 |
Relative Atomic Mass | |
g-factor | |
natural abundance | |
radioactivity | ☢️ radioactive element |
half-life | 2.5 ± 2.3 zs
|
spin | 1/2 |
nuclear quadrupole moment | 0
|
time of discovery or invention | 1987 |
parity |
decay mode | intensity |
---|---|
n (neutron emission) | 100% |
mass number | 10 |
---|---|
neutron number | 8 |
Relative Atomic Mass | |
g-factor | 0
|
natural abundance | |
radioactivity | ☢️ radioactive element |
half-life | 260 ± 40 ys
|
spin | 0 |
nuclear quadrupole moment | 0
|
time of discovery or invention | 1994 |
parity | + |
decay mode | intensity |
---|---|
2n (2-neutron emission) | 100% |
discoverer or inventor | Sir William Ramsey, Nils Langet, P.T.Cleve |
---|---|
location of discovery | Scotland/Sweden |
time of discovery or invention | 1895 |
etymology | Greek: hêlios (sun). |
pronunciation | HEE-li-em (ئىنگلىزچە) |
Abundance | |
---|---|
Abundance in Earth's crust | |
natural abundance (ئوكيانىيە) | |
natural abundance (human body) | |
natural abundance (meteoroid) | |
natural abundance (قۇياش) | 23 %
|
Abundance in Universe | 23 %
|
1 | s | 0.3125 |