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Protactinium
Protactinium

Polonium
Polonium



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Protactinium
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Polonium

Protactinium and Polonium Periodic Table

Periodic Table

Symbol

Group Number

Period Number

Block

Element Family

CAS Number

Space Group Name

Space Group Number

 
Pa
3
7
f block
Actinide
7440133
I4/mmm
139.00
 
Po
16
6
p block
Post-​Transition
7440086
Pm-3m
221.00