Helij (He)

kemijski element simbola He, lagani plemeniti plin, korišten za punjenje balona

Atomski broj	2
Relativna atomska masa	4.002602
Maseni broj	4

Skupina	18
Perioda	1
Blok	s

proton	2 p⁺
neutron	2 n⁰
elektron	2 e^-

Animated Bohrov model atoma of He (Helij)

Physical Property

Atomski Radijus	120 pm 134 pm
Molni volumen	31,8 cm³/mol
Kovalentni Radijus	46 pm 28 pm
Metallic Radius	122 pm
Ionski radijus
Crystal Radius
Van der Waals radius	140 pm 140 pm 153 pm 236,2 pm
gustoća	0,000164 g/cm³

Kemijsko Svojstvo

energija

proton affinity	177,8 kJ/mol
Elektronski afinitet	−19,7 eV/particle
ionization energy	24,587387936 eV/particle 54,41776311 eV/particle

Toplina isparivanja	0,08 kJ/mol
toplina taljenja
standard enthalpy of formation
elektron

Elektronska ljuska	2

valence electron	2 ⓘ

electron configuration	1s²ⓘ

Oksidacijski broj
Elektronegativnost	24,59 eV/particle 0.442712
Electrophilicity Index	0,0674191963846371 eV/particle
fundamental state of matter

agregatno stanje	Plinovito
gaseous state of matter	Monoatomic
Vrelište	4,222 K
Talište
critical pressure	0,22746 MPa
critical temperature	5,195 K
Trojna točka	2,177 K 5,043 kPa
appearance
boja	Bezbojan #ffc0cb #d9ffff #d9ffff
appearance	colorless gas, exhibiting a red-orange glow when placed in a high-voltage electric field
Indeks prelamanja	1,000035
thermodynamic material property
Toplinska vodljivost	0,152 W/(m K)
Toplinsko istezanje
molar heat capacity	20,786 J/(mol K)
Specifični toplinski kapacitet	5,193 J/(g⋅K)
heat capacity ratio	5/3
electrical properties
type
electrical conductivity
Električna otpornost i provodnost
Supravodljivost
Magnetizam
type	diamagnetic
Magnetna susceptibilnost (Mass)	−0,0000000059 m³/Kg
Magnetna susceptibilnost (Molar)	−0,0000000000236 m³/mol
Magnetna susceptibilnost (Volume)	−0,00000000105
magnetic ordering
Curieva temperatura
Néel temperature
struktura
Kristalna struktura	Kubna plošno centrirana (HEX)
lattice constant	3,57 Å
Lattice Angles	π/2, π/2, π/2
mechanical property
Tvrdoća
bulk modulus
shear modulus
Youngov modul elastičnosti
Poissonov omjer
brzina zvuka	970 m/s
classification
Kategorija	Plemeniti plinovi, Noble gases
CAS Group	VIII
IUPAC Group	VIIIA
Glawe Number	1
Mendeleev Number	112
Pettifor Number	1
Geochemical Class	volatile
Goldschmidt classification	atmophile

other

Gas Basicity	148,5 kJ/mol
polarizability	1,38375 ± 0,00002 a₀
C6 Dispersion Coefficient	1,42 a₀ 1,47 a₀
allotrope
Nuklearni udarni presjek	0,007
Neutron Mass Absorption	0,00001
Kvantni brojevi	1S0
space group	225 (Fm_3m)

Isotopes of Helium

Stabilni izotopi	2
Nestabilni izotopi	6
Natural Isotopes	2

³He

Maseni broj	3
neutron number	1
Relativna Atomska Masa	3,01602932197 ± 0,00000000006 Da
g-factor	−4,25525062 ± 0,00000006
natural abundance	0,0002 ± 0,0002
radioaktivnost	stable isotope
Vrijeme poluraspada	Not Radioactive ☢️
spin	1/2
nuclear quadrupole moment	0
vrijeme otkrića ili izuma	1934
Parnost	+

⁴He

Maseni broj	4
neutron number	2
Relativna Atomska Masa	4,00260325413 ± 0,00000000016 Da
g-factor	0
natural abundance	99,9998 ± 0,0002
radioaktivnost	stable isotope
Vrijeme poluraspada	Not Radioactive ☢️
spin	0
nuclear quadrupole moment	0
vrijeme otkrića ili izuma	1908
Parnost	+

⁵He

Maseni broj	5
neutron number	3
Relativna Atomska Masa	5,012057224 ± 0,00002147 Da
g-factor
natural abundance
radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	602 ± 22 ys
spin	3/2
nuclear quadrupole moment
vrijeme otkrića ili izuma	1937
Parnost	-

decay mode	intensity
n (neutron emission)	100%

⁶He

Maseni broj	6
neutron number	4
Relativna Atomska Masa	6,018885889 ± 0,000000057 Da
g-factor	0
natural abundance
radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	806,92 ± 0,24 ms
spin	0
nuclear quadrupole moment	0
vrijeme otkrića ili izuma	1936
Parnost	+

decay mode	intensity
β⁻ (β⁻ decay)	100%
β⁻ d (β⁻-delayed deuteron emission)	0.000278%

⁷He

Maseni broj	7
neutron number	5
Relativna Atomska Masa	7,027990652 ± 0,000008115 Da
g-factor
natural abundance
radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	2,51 ± 0,07 zs
spin	3/2
nuclear quadrupole moment
vrijeme otkrića ili izuma	1967
Parnost

decay mode	intensity
n (neutron emission)	100%

⁸He

Maseni broj	8
neutron number	6
Relativna Atomska Masa	8,033934388 ± 0,000000095 Da
g-factor	0
natural abundance
radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	119,5 ± 1,5 ms
spin	0
nuclear quadrupole moment	0
vrijeme otkrića ili izuma	1965
Parnost	+

decay mode	intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)	16%
β⁻ t (β⁻-delayed triton emission)	0.9%

⁹He

Maseni broj	9
neutron number	7
Relativna Atomska Masa	9,043946414 ± 0,000050259 Da
g-factor
natural abundance
radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	2,5 ± 2,3 zs
spin	1/2
nuclear quadrupole moment	0
vrijeme otkrića ili izuma	1987
Parnost

decay mode	intensity
n (neutron emission)	100%

¹⁰He

Maseni broj	10
neutron number	8
Relativna Atomska Masa	10,052815306 ± 0,000099676 Da
g-factor	0
natural abundance
radioaktivnost	☢️ radioactive element
Vrijeme poluraspada	260 ± 40 ys
spin	0
nuclear quadrupole moment	0
vrijeme otkrića ili izuma	1994
Parnost	+

decay mode	intensity
2n (2-neutron emission)	100%

povijest

otkrio/izumio	Sir William Ramsey, Nils Langet, P.T.Cleve
location of discovery	Scotland/Sweden
vrijeme otkrića ili izuma	1895
Etimologija	Greek: hêlios (sun).
pronunciation	HEE-li-em (engleski)

source

Obilnost
Zastupljenost u Zemljinoj kori	0,008 mg/kg
natural abundance (ocean)	0,000007 mg/L
natural abundance (tijelo)
natural abundance (meteoroid)
natural abundance (Sunce)	23 %
Zastupljenost u svemiru	23 %

Nuclear Screening Constants

0.3125

Helij on ChemicalAid

ATK šifra	V03AN03
Australian Educational Vocabulary ID	scot/3528
BNCF Thesaurus ID	19752
BNF	11978648w
Brockhaus Enzyklopädie online ID	helium-20
CAB ID	178029
CAS registarski broj	7440-59-7
ChEBI ID	30217
ChEMBL ID	CHEMBL1796997
ChemSpider ID	22423
Common Procurement Vocabulary	24111300
DSSTOX compound identifier	DTXCID5016402
DSSTox substance ID	DTXSID7036402
De Agostini ID	èlio
Den Store Danske ID	helium
Drugbank ID	09155
ECHA Substance Infocard ID	100.028.334
Encyclopædia Universalis ID	helium
E number	E939
Freebase ID	/m/025rt79
French Vikidia ID	Hélium
GND identifikator	4132459-6
Golden ID	Helium-K8NB
Great Russian Encyclopedia Online ID	2348591
HSDB ID	553
ICSC ID	0603
ID oznaka teme na Quori	Helium
ID oznaka u mrežnoj enciklopediji Britannici	science/helium-chemical-element
InChI	InChI=1S/He
InChIKey	SWQJXJOGLNCZEY-UHFFFAOYSA-N
Italian Vikidia ID	Elio
KBpedia ID	Helium
Klexikon article ID	Helium
Krugosvet article	nauka_i_tehnika/himiya/GELI.html
LCCN	sh85060043
MeSH ID	D006371
Mindat mineral ID	25563
NALT ID	44987
NDF-RT ID	N0000147379
NDL ID	00563132
NE.se ID	helium
NKCR broj	ph503003
Namuwiki ID	헬륨
National Library of Israel J9U ID	987007555644805171
Online PWN Encyclopedia ID	3910758
OpenAlex ID	C546029482
OpenAlex ID	C2991909631
PSH ID	5816
Probes And Drugs ID	PD009020
PubChem ID	23987
RxNorm ID	5140
Römpp online ID	RD-08-00783
Spanish Vikidia ID	Helio
Store norske leksikon ID	helium
Treccani ID	elio
U.S. National Archives Identifier	10640583
UMLS CUI	C0018880
UNII	206GF3GB41
USGS Thesaurus ID	1470
WordNet 3.1 Synset ID	14664099-n
World of Physics ID	Helium
YSO ID	14499
ZVG number	7020
značenje prema OmegaWiki	7296

Helij (He)

Physical Property

Kemijsko Svojstvo

other

Isotopes of Helium

3He

4He

5He

6He

7He

8He

9He

10He

povijest

source

Nuclear Screening Constants

³He

⁴He

⁵He

⁶He

⁷He

⁸He

⁹He

¹⁰He