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

Top | About | Search | Comment | PC Chemistry

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18

H He

Li Be B C N O F Ne

Na Mg Al Si P S Cl Ar

K Ca Sc Ti V Cr Mn Fe Co Ni Cu Zn Ga Ge As Se Br Kr

Rb Sr Y Zr Nb Mo Tc Ru Rh Pd Ag Cd In Sn Sb Te I Xe

Cs Ba La* Hf Ta W Re Os Ir Pt Au Hg Tl Pb Bi Po At Rn

Fr Ra Ac** Rf Db Sg Bh Hs Mt 110 111 112 113

Lanthanides* Ce Pr Nd Pm Sm Eu Gd Tb Dy Ho Er Tm Yb Lu

Actinides ** Th Pa U Np Pu Am Cm Bk Cf Es Fm Md No Lr

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

Updated by clh on 2/6/98. This is not a publication of Phoenix College.

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
**Top \| About \| Search \| Comment \| PC Chemistry**

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