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Lead
Lead

Francium
Francium



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Francium

Lead and Francium Periodic Table

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Periodic Table

Symbol

Pb
Fr

Group Number

141
0 17
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Period Number

67
2 7
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Block

p block
s block

Element Family

Post-​Transition
Alkali

CAS Number

74399217440735
7429905 54386242
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Space Group Name

Fm_ 3m
-

Space Group Number

225.00225.00
11 276
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