CAS Number7440-66-6
PubChem CID23994
Atomic Radius134
Atomic Volume9.2
Atomic Weight65.38
Boiling Point907
Bulk Modulus
CategoryTransition metals
Crystal StructureSimple Hexagonal
ColorSlate Gray
Covalent Radius122
Electrical Resistivity
Electron Configuration[Ar] 3d10 4s2
Electrons per shell2, 8, 18, 2
Heat of Fusion7.35
Heat of Vaporization119
Ionization Potential9.394
Magnetic Ordering
Magnetic Susceptibility
Mass Number30
Melting Point419.53
Atomic Number65
Oxidation States1, 2
Poisson Ratio
Shear Modulus
Specific Heat Capacity0.388
Thermal Conductivity1.16
Van der Waals radius
Young's Modulus
Abundance in Earth's crust0.0078%
Abundance in Universe0.00003%
Zn Zinc 30 65.409 12 4 d 30 419.6 906.0 [Ar] 3d10 4s2 2 8 18 2 7.13 0.0078% SlateGray Hexagonal 1.7 1.59 {"1":"906.4","2":"1733.3","3":"3833","4":"5731","5":"7970","6":"10400","7":"12900","8":"16800","9":"19600","10":"23000","11":"26400","12":"29990","13":"40490","14":"43800","15":"47300","16":"52300","17":"55900","18":"59700","19":"67300","20":"71200","21":"179100"} 906 0 131 2 1.38 9.2 7.38 115.3 0.388 116.0 0 Solid, Diamagnetic, Conductor, TransitionMetal, Metal, Stable, Natural ZINK Bluish-silver, ductile metal. Used to coat other metal (galvanizing) to protect them from rusting. Also used in alloys such as brass, bronze, nickel. Also in solder, cosmetics and pigments. Found in the minerals zinc blende (sphalerite) (ZnS), calamine, franklinite, smithsonite (ZnCO3), willemite, and zincite (ZnO). 99wPiMb-k0o Zinc
French astronomer Jules Janssen obtained the first evidence of helium during the solar eclipse of 1868.

Norman Lockyer and Edward Frankland suggested the name helium for the new element.

In 1895, Sir William Ramsay discovered helium in the uranium mineral cleveite.

It was independently discovered in cleveite by Per Teodor Cleve and Abraham Langlet. From the Greek word helios, the sun 30 1500 Andreas Marggraf Germany From the German word "zink"

Isotopes of Helium

Standard Atomic Weight


Stable Isotopes

64Zn 66Zn 67Zn 68Zn 70Zn

Unstable Isotopes

54Zn 55Zn 56Zn 57Zn 58Zn 59Zn 60Zn 61Zn 62Zn 63Zn 65Zn 69Zn 71Zn 72Zn 73Zn 74Zn 75Zn 76Zn 77Zn 78Zn 79Zn 80Zn 81Zn 82Zn 83Zn

Helium is not known to be toxic
Unlike any other element, helium will remain liquid down to absolute zero at normal pressures
Helium is used as a protective gas in growing silicon and germanium crystals, in titanium and zirconium production, and in gas chromatography.

Helium at low temperatures is used in cryogenics.

Helium is used for filling balloons and for pressurizing liquid fuel rockets.

Helium is used as a shielding gas in arc welding processes.