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.

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: Click mass number for decay process, product for element page.

 

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
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
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
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
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
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
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
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
190
30.0 min
B-,1.270 MeV
Re-190
189.96318
MASS abund.
Halflife
Particle, Energy
Decay Product(s)
Isotopic Mass