Re - Rhenium

A very dense transition metal, discovered in 1925 by Noddack, Tacke and Berg in Germany.

Atomic number - 75 Density g/mL 21
Atomic weight u 186 .207 Melting point K 3453
Bonding radius A 1 .28 Boiling point K 5869
Atomic radius A 1 .97 Heat of vaporization kJ/mol 715
Ionization Potential V 7 .88 Heat of fusion kJ/mol 33 .2
Electronegativity - 1 .9 Specific heat J/gK 0 .13
The oxide is mildly acidic.
Crystal are hexagonal.

Electron config. : [Xe] 4f14 5d5 6s2


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


160
0.79 msec
a/p,1.290 MeV
Ta-156/W-159
159.98153
161
15 msec
a,6.440 MeV
Ta-157
160.97767
162
0.10 sec
a/EC,11.500
Ta-158/W-162
161.97573
163
260 msec
a/EC,6.010
Ta-159/W-163
162.97196
164
0.53 sec
a/EC,5.920
Ta-160/W-164
163.97047
165
2.4 sec
a/EC,8.120
Ta-161/W-165
164.96705
166
2.8 sec
a,5.640 MeV
Ta-162
165.96580
167
3.4 sec
a/EC,5.240
Ta-163/W-167
166.96259
168
4.4 sec
a/EC,9.100
Ta-164/W-168
167.96156
169
8.1 sec
a/EC,6.600
Ta-165/W-169
168.95882
170
9.2 sec
EC,8.300 MeV
W-170
169.95813
171
15.2 sec
EC,5.670 MeV
W-171
170.95544
172
15 sec
EC,7.300 MeV
W-172
171.95534
173
1.98 min
EC,4.800 MeV
W-173
172.95308
174
2.40 min
EC,6.500 MeV
W-174
173.95308
175
5.89 min
EC,4.300 MeV
W-175
174.95136
176
5.3 min
EC,5.600 MeV
W-176
175.95157
177
14 min
EC,3.400 MeV
W-177
176.95027
178
13.2 min
EC,4.660 MeV
W-178
177.95085
179
19.5 min
EC,2.710 MeV
W-179
178.94998
180
2.44 min
EC,3.800 MeV
W-180
179.95078
181
19.9 hr
EC,1.739 MeV
W-181
180.95006
182
64.0 hr
EC,2.800 MeV
W-182
181.95120
183
70.0 da
EC,1.070 MeV
W-183
182.95082
184
38.0 da
EC,1.483 MeV
W-184
183.95252
185 37.40%

Stable

184.95295
186
89.25 hr
B-/EC,1.069
Os-186/W-186
185.95498
187 62.60%
4.35E10 yr
a/B-,1.311
Ta-183/Os-187
186.95575
188
17.021 hr
B-,2.120 MeV
Os-188
187.95811
189
24.3 hr
B-,1.009 MeV
Os-189
188.95922
190
3.1 min
B-,3.150 MeV
Os-190
189.96182
191
9.8 min
B-,2.045 MeV
Os-191
190.96312
192
16 sec
B-,4.170 MeV
Os-192
191.96595
MASS abund.
Halflife
Particle, Energy
Decay Product(s)
Isotopic Mass