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Lead
Lead

Thorium
Thorium



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Lead and Thorium Periodic Table

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Periodic Table

Symbol

Pb
Th

Group Number

140
0 17
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Period Number

67
2 7
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Block

p block
f block

Element Family

Post-​Transition
Actinide

CAS Number

74399217440326
7429905 54386242
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Space Group Name

Fm_ 3m
P63/mmc

Space Group Number

225.00194.00
11 276
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