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Protactinium
Protactinium

Roentgenium
Roentgenium



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Protactinium
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Roentgenium

Protactinium and Roentgenium Periodic Table

Periodic Table

Symbol

Pa
Rg

Group Number

311
0 17
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Period Number

77
2 7
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Block

f block
d block

Element Family

Actinide
-

CAS Number

744013354386242
7429905 54386242
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Space Group Name

I4/mmm
-

Space Group Number

139.00194.00
11 276
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