మూస:Infobox molybdenum

మాలిబ్డెనం, ₀₀Mo

మాలిబ్డెనం
Pronunciation	/məˈlɪbdənəm/ ​(mə-LIB-də-nəm)
Appearance	gray metallic
Standard atomic weight Ar°(Mo)
	95.95±0.01 95.95±0.01 (abridged)
మాలిబ్డెనం in the periodic table
Hydrogen Helium Lithium Beryllium Boron Carbon Nitrogen Oxygen Fluorine Neon Sodium Magnesium Aluminium Silicon Phosphorus Sulfur Chlorine Argon Potassium Calcium Scandium Titanium Vanadium Chromium Manganese Iron Cobalt Nickel Copper Zinc Gallium Germanium Arsenic Selenium Bromine Krypton Rubidium Strontium Yttrium Zirconium Niobium Molybdenum Technetium Ruthenium Rhodium Palladium Silver Cadmium Indium Tin Antimony Tellurium Iodine Xenon Caesium Barium Lanthanum Cerium Praseodymium Neodymium Promethium Samarium Europium Gadolinium Terbium Dysprosium Holmium Erbium Thulium Ytterbium Lutetium Hafnium Tantalum Tungsten Rhenium Osmium Iridium Platinum Gold Mercury (element) Thallium Lead Bismuth Polonium Astatine Radon Francium Radium Actinium Thorium Protactinium Uranium Neptunium Plutonium Americium Curium Berkelium Californium Einsteinium Fermium Mendelevium Nobelium Lawrencium Rutherfordium Dubnium Seaborgium Bohrium Hassium Meitnerium Darmstadtium Roentgenium Copernicium Ununtrium Flerovium Ununpentium Livermorium Ununseptium Ununoctium Cr ↑ Mo ↓ W నియోబియం ← మాలిబ్డెనం → టెక్నీషియం
Group	మూస:Infobox element/symbol-to-group/format
Period	period 5
Block	d-block
Electron configuration	[Kr] 4d5 5s1
Electrons per shell	2, 8, 18, 13, 1
Physical properties
Phase at STP	solid
Melting point	2896 K ​(2623 °C, ​4753 °F)
Boiling point	4912 K ​(4639 °C, ​8382 °F)
Density (near r.t.)	10.28 g/cm3
when liquid (at m.p.)	9.33 g/cm3
Heat of fusion	37.48 kJ/mol
Heat of vaporization	598 kJ/mol
Molar heat capacity	24.06 J/(mol·K)
Vapor pressure P (Pa) 1 10 100 1 k 10 k 100 k at T (K) 2742 2994 3312 3707 4212 4879
Atomic properties
Oxidation states	−4, −2, −1, 0, +1, +2, +3, +4, +5, +6 (a strongly acidic oxide)
Electronegativity	Pauling scale: 2.16
Atomic radius	empirical: 139 pm
Covalent radius	154±5 pm
Spectral lines of మాలిబ్డెనం
Other properties
Natural occurrence	primordial
Crystal structure	​body-centered cubic (bcc)
Speed of sound thin rod	5400 m/s (at r.t.)
Thermal expansion	4.8 µm/(m⋅K) (at 25 °C)
Thermal conductivity	138 W/(m⋅K)
Thermal diffusivity	54.3 mm2/s (at 300 K)
Electrical resistivity	53.4 n Ω⋅m (at 20 °C)
Magnetic ordering	paramagnetic
Young's modulus	329 GPa
Shear modulus	126 GPa
Bulk modulus	230 GPa
Poisson ratio	0.31
Mohs hardness	5.5
Vickers hardness	1530 MPa
Brinell hardness	1500 MPa
CAS Number	7439-98-7
History
Discovery	Carl Wilhelm Scheele (1778)
First isolation	Peter Jacob Hjelm (1781)
Isotopes of మాలిబ్డెనం

References

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