Po - Polonium

Polonium was discovered by Marie Curie in 1898 in Paris.

Atomic number - 84 Density g/mL 9 .4
Atomic weight u 209 Melting point K 527
Bonding radius A 1 .46 Boiling point K 1235
Atomic radius A 1 .53 Heat of vaporization kJ/mol -
Ionization Potential V 8 .42 Heat of fusion kJ/mol -
Electronegativity - 2 Specific heat J/gK -
The oxide is amphoteric.
Crystal are monoclinic.

Electron config. : [Xe] 4f14 5d10 6s2 6p4

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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 Po: Click mass number for decay process, product for element page.
190
9.6 msec
a,7.643 MeV
Pb-186
189.99506 		191
15.5 msec
a,7.471 MeV
Pb-187
190.99452 		192
0.034 sec
a/EC,7.320
Pb-188/Bi-192
191.99151 		193
360 msec
a,7.100 MeV
Pb-189
192.99108 		194
0.392 sec
a,6.987 MeV
Pb-190
193.98828 		195
4.64 sec
a/EC,6.750
Pb-191/Bi-195
194.98804 		196
5.8 sec
a/EC,6.657
Pb-192/Bi-196
195.98551
197
53.6 sec
a/EC,6.200
Pb-193/Bi-197
196.98557 		198
1.76 min
a/EC,6.309
Pb-194/Bi-198
197.98333 		199
5.48 min
a/EC,5.600
Pb-195/Bi-199
198.98357 		200
11.5 min
a/EC,3.350
Pb-196/Bi-200
199.98173 		201
15.3 min
a/EC,4.880
Pb-197/Bi-201
200.98221 		202
44.7 min
a/EC,2.820
Pb-198/Bi-202
201.98069 		203
36.7 min
a/EC,4.230
Pb-199/Bi-203
202.98141
204
3.53 hr
a/EC,2.340
Pb-200/Bi-204
203.98030 		205
1.66 hr
a/EC,3.530
Pb-201/Bi-205
204.98117 		206
8.8 da
a/EC,1.846
Pb-202/Bi-206
205.98046 		207
5.80 hr
a/EC,2.909
Pb-203/Bi-207
206.98157 		208
2.898 yr
a/EC,5.215
Pb-204/Bi-208
207.98123 		209
102 yr
a/EC,4.979
Pb-205/Bi-209
208.98241 		210
138.376 da
a,5.407 MeV
Pb-206
209.98285
211
0.516 sec
a,7.595 MeV
Pb-207
210.98663 		212
0.299 usec
a,8.954 MeV
Pb-208
211.98885 		212a
45.1 sec
a,11.876 MeV
Pb-208
211.99198 		213
4.2 usec
a,8.537 MeV
Pb-209
212.99284 		214
164.3 usec
a,7.833 MeV
Pb-210
213.99518 		215
1.781 msec
a/B-,7.526
Pb-211/At-215
214.99941 		216
0.145 sec
a,6.906 MeV
Pb-212
216.00190
217
10 sec
a/B-,6.660
Pb-213/At-217
217.00634 		218
3.10 min
a/B-,6.115
Pb-214/At-218
218.00896 		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.