Helium

E Vicipaedia

Hydrogenium ← Helium → Lithium
H
↑
He
↓
Li
Huic imagini nondum est descriptio, quaesumus descriptionem addas.
Proprietas generalae
Nomen, Symbolus, Numerus atomicus Helium, He, 2
Turma, Periodus, Glaeba VIIIA, 1 , s
Color Huic imagini nondum est descriptio, quaesumus descriptionem addas.
Pondus atomicum 4.002602(2) uam
e- 2
Proprietas physicae
Status Gasa
Densitas (0 °C, 101.325 kPa) 0.1786 g/L
Punctum liquofactu 0.95 K (-272.2 °C, -458.0 °F)
Punctum fervoris 4.22 K (-268.93 °C, -452.07 °F)
Calor latens fusionis 0.0138 kJ·mol−1
Capacitas caloris (25 °C) 20.786 J·mol−1·K−1
Proprietas atomicae
Structura crystallina Hexagona
Numerus Stock 0
Radius atomicus (calc.) 31 pm
Radius covalenta 32 pm
Radius van der Waals 140 pm
Varietas
Conductus caloris (300 K) 151.3 mW·m−1·K−1
CAS registerum numeri 7440-59-7
Isotopa conspicienda
3He 0.000137% Stabilis
4He 99.999863% Stabilis

Helium (-ii, n.), He abbreviatur, est elementum chemicum in systemate periodico. Id ante Lithium et post Hydrogenium in systemate periodico secundum locum tenet.

Hydrogenium in statu normali (298 K) aeriformis est. Status aggregationis liquidus sub 0.95 K

Monitio: Huic imagini nondum est descriptio, quaesumus descriptionem addas.
1 H 2 He 3 Li 4 Be 5 B 6 C 7 N 8 O 9 F 10 Ne 11 Na 12 Mg 13 Al 14 Si 15 P 16 S 17 Cl 18 Ar 19 K 20 Ca 21 Sc 22 Ti 23 V 24 Cr 25 Mn 26 Fe 27 Co 28 Ni 29 Cu 30 Zn 31 Ga 32 Ge 33 As 34 Se 35 Br 36 Kr 37 Rb 38 Sr 39 Y 40 Zr 41 Nb 42 Mo 43 Tc 44 Ru 45 Rh 46 Pd 47 Ag 48 Cd 49 In 50 Sn 51 Sb 52 Te 53 I 54 Xe 55 Cs 56 Ba 57 La 58 Ce 59 Pr 60 Nd 61 Pm 62 Sm 63 Eu 64 Gd 65 Tb 66 Dy 67 Ho 68 Er 69 Tm 70 Yb 71 Lu 72 Hf 73 Ta 74 W 75 Re 76 Os 77 Ir 78 Pt 79 Au 80 Hg 81 Tl 82 Pb 83 Bi 84 Po 85 At 86 Rn 87 Fr 88 Ra 89 Ac 90 Th 91 Pa 92 U 93 Np 94 Pu 95 Am 96 Cm 97 Bk 98 Cf 99 Es 100 Fm 101 Md 102 No 103 Lr 104 Rf 105 Db 106 Sg 107 Bh 108 Hs 109 Mt 110 Ds 111 Rg 112 Uub 113 Uut 114 Uuq 115 Uup 116 Uuh 117 Uus 118 Uuo

Receptum de "http://la.wikipedia.org/wiki/Helium"
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