Mendeleev's Periodic Table > Pb - Lead

Pb - Lead

A toxic heavy metal. Its malleability has been lead's greatest virtue as it has been used since ancient times for containers and water pipes. Lead pipes bearing the insignia of Roman emperors, used as drains from the baths, are still in service. Lead is a bluish-white lustrous metal. It is very soft, highly malleable, ductile, and a relatively poor conductor of electricity. It is very resistant to corrosion but tarnishes upon exposure to air. Alloys include pewter and solder. Lead isotopes are the end products of each of the three series of naturally occurring radioactive elements.

Atomic number - 82 Density g/mL 11 .4
Atomic weight u 207 .2 Melting point K 600 .6
Bonding radius A 1 .47 Boiling point K 2023
Atomic radius A 1 .81 Heat of vaporization kJ/mol 177 .7
Ionization Potential V 7 .416 Heat of fusion kJ/mol 4 .799
Electronegativity - 2 .33 Specific heat J/gK 0 .13
The oxide is amphoteric. Crystal are face centered cubic.
Electron config. : [Xe] 4f14 5d10 6s2 6p2

Isotopes of Pb (Lead) :

MASS abundancy
Halflife
Particle, Energy
Decay Product(s)
Isotopic Mass		 181
45 msec
a/EC,7.370
Hg-177/Tl-181
180.99685 		182
55 msec
a,7.076 MeV
Hg-178
181.99267 		183
300 msec
a/EC,7.030
Hg-179/Tl-183
182.99194 		184
0.55 sec
a/EC,6.775
Hg-180/Tl-184
183.98820
MASS abundancy
Halflife
Particle, Energy
Decay Product(s)
Isotopic Mass		 185
4.1 sec
a,6.680 MeV
Hg-181
184.98754 		186
4.7 sec
a,6.471 MeV
Hg-182
185.98432 		187
18.3 sec
a/EC,7.200
Hg-183/Tl-187
186.98389 		188
24.2 sec
a/EC,4.800
Hg-184/Tl-188
187.98106
MASS abundancy
Halflife
Particle, Energy
Decay Product(s)
Isotopic Mass		 189
51 sec
a/EC,6.700
Hg-185/Tl-189
188.98089 		190
1.2 min
a/EC,4.100
Hg-186/Tl-190
189.97817 		191
1.33 min
a/EC,5.900
Hg-187/Tl-191
190.97819 		192
3.5 min
a/EC,3.400
Hg-188/Tl-192
191.97575
MASS abundancy
Halflife
Particle, Energy
Decay Product(s)
Isotopic Mass		 193

EC,5.200 MeV
Tl-193
192.97608 		194
12.0 min
a/EC,2.700
Hg-190/Tl-194
193.97396 		195
15 min
EC,4.500 MeV
Tl-195
194.97444 		196
37 min
a/EC,2.050
Hg-192/Tl-196
195.97271
MASS abundancy
Halflife
Particle, Energy
Decay Product(s)
Isotopic Mass		 197
8 min
EC,3.580 MeV
Tl-197
196.97337 		198
2.40 hr
EC,1.410 MeV
Tl-198
197.97198 		199
90 min
EC,2.880 MeV
Tl-199
198.97290 		200
21.5 hr
EC,2.456 MeV
Tl-200
199.97181
MASS abundancy
Halflife
Particle, Energy
Decay Product(s)
Isotopic Mass		 201
9.33 hr
EC,1.900 MeV
Tl-201
200.97285 		201a
61 sec
EC,2.529 MeV
Tl-201
200.97352 		202
52.5E+3 yr
a/EC,1.364
Hg-198/Tl-202
201.97214 		203
51.873 hr
EC,2.139 MeV
Tl-203
202.97337
MASS abundancy
Halflife
Particle, Energy
Decay Product(s)
Isotopic Mass		 204 1.4%
1.4E+17 yr
a,3.800 MeV
Hg-200
203.97302 		205
1.53E+7 yr
EC,1.531 MeV
Tl-205
204.97446 		206 24.1%

Stable

205.97444 		207 22.1%

Stable

206.97588
MASS abundancy
Halflife
Particle, Energy
Decay Product(s)
Isotopic Mass		 208 52.4%

Stable

207.97663 		209
3.253 hr
B-,3.980 MeV
Bi-209
208.98107 		210
22.3 yr
a/B-,5.484
Hg-206/Bi-210
209.98417 		211
36.1 min
B-,1.373 MeV
Bi-211
210.98873
MASS abundancy
Halflife
Particle, Energy
Decay Product(s)
Isotopic Mass		 212
10.64 hr
B-,5.965 MeV
Bi-212
211.99188 		213
10.2 min
B-,2.070 MeV
Bi-213
212.99659 		214
26.8 min
B-,1.024 MeV
Bi-214
213.99979