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Protactinium
Protactinium

Francium
Francium



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Protactinium
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Francium

Protactinium and Francium Periodic Table

Periodic Table

Symbol

Pa
Fr

Group Number

31
0 17
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Period Number

77
2 7
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Block

f block
s block

Element Family

Actinide
Alkali

CAS Number

74401337440735
7429905 54386242
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Space Group Name

I4/mmm
-

Space Group Number

139.00225.00
11 276
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