Mendeleev's Periodic Table > W - Tungsten

W - Tungsten

Wolfram, also known as tungsten, is used for lightbulb filiments. Discovered by Swedish pharmacist Karl Scheele in 1781 in the mineral called tungsten (now known as scheelite). Spanish chemists and brothers Don Fausto, and Don Juan del Huyar extracted the pure metal from another mineral, wolframite in 1873. Pure tungsten is a steel-gray to tin-white metal. Tungsten has the highest melting point and lowest vapour pressure of all metals, and at temperatures over 1650°C has the highest tensile strength. The metal oxidises in air and must be protected at elevated temperatures. It has excellent corrosion resistance and is attacked only slightly by most mineral acids.

Atomic number	-	74		Density	g/mL	19	.3
Atomic weight	u	183	.85	Melting point	K	3680
Bonding radius	A	1	.3	Boiling point	K	5828
Atomic radius	A	2	.02	Heat of vaporization	kJ/mol	824
Ionization Potential	V	7	.98	Heat of fusion	kJ/mol	35	.4
Electronegativity	-	2	.36	Specific heat	J/gK	0	.13
The oxide is mildly acidic.				Crystal are body centered cubic.
Electron config. : [Xe] 4f¹⁴ 5d⁴ 6s²

Isotopes of W (Tungsten) :

MASS abundancy Halflife Particle, Energy Decay Product(s) Isotopic Mass	158 0.9 msec a,6.600 MeV Hf-154 157.97391	159 7.3 msec a/EC,6.440 Hf-155/Ta-159 158.97230	160 91 msec a,6.072 MeV Hf-156 159.96833	161 410 msec a/EC,5.920 Hf-157/Ta-161 160.96704
MASS abundancy Halflife Particle, Energy Decay Product(s) Isotopic Mass	162 1.39 sec a/EC,5.770 Hf-158/Ta-162 161.96333	163 2.75 sec a/EC,7.700 Hf-159/Ta-163 162.96253	164 6.4 sec a/EC,5.000 Hf-160/Ta-164 163.95890	165 5.1 sec a/EC,7.010 Hf-161/Ta-165 164.95833
MASS abundancy Halflife Particle, Energy Decay Product(s) Isotopic Mass	166 18.8 sec a/EC,4.200 Hf-162/Ta-166 165.95502	167 19.9 sec a/EC,4.670 Hf-163/Ta-167 166.95469	168 51 sec a/EC,3.800 Hf-164/Ta-168 167.95186	169 80 sec EC,5.400 MeV Ta-169 168.95179
MASS abundancy Halflife Particle, Energy Decay Product(s) Isotopic Mass	170 2.42 min EC,3.000 MeV Ta-170 169.94932	171 2.38 min EC,4.600 MeV Ta-171 170.94932	172 6.6 min EC,2.500 MeV Ta-172 171.94739	173 7.6 min EC,4.000 MeV Ta-173 172.94793
MASS abundancy Halflife Particle, Energy Decay Product(s) Isotopic Mass	174 31 min EC,1.900 MeV Ta-174 173.94610	175 35.2 min EC,2.910 MeV Ta-175 174.94677	176 2.5 hr EC,3.110 MeV Ta-176 175.94559	177 135 min EC,2.000 MeV Ta-177 176.94664
MASS abundancy Halflife Particle, Energy Decay Product(s) Isotopic Mass	178 21.6 da EC,1.471 MeV Ta-178 177.94585	179 37.05 min EC,1.060 MeV Ta-179 178.94707	180 0.120% Stable 179.94670	181 121.2 da EC,1.027 MeV Ta-181 180.94819
MASS abundancy Halflife Particle, Energy Decay Product(s) Isotopic Mass	182 26.498% Stable 181.94820	183 14.314% 1.1E+17 yr ,1.070 MeV 182.95022	184 30.642% 3E+17 yr a,2.870 MeV Hf-180 183.95093	185 75.1 da B-,1.992 MeV Re-185 184.95342
MASS abundancy Halflife Particle, Energy Decay Product(s) Isotopic Mass	186 28.426% Stable 185.95436	187 23.72 hr B-,1.311 MeV Re-187 186.95715	188 69.4 da B-,7.750 MeV Re-188 187.95848	189 11.5 min B-,2.500 MeV Re-189 188.96191
MASS abundancy Halflife Particle, Energy Decay Product(s) Isotopic Mass	190 30.0 min B-,1.270 MeV Re-190 189.96318