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Radium and Protactinium Periodic Table

Radium
Protactinium
Protactinium and Radium in Periodic Table


Periodic Table
Symbol
Ra   
Pa   
Group Number
2   
16
Not Available   
Period Number
7   
7   
Block
s block   
f block   
Element Family
Alkaline Earth   
Actinide   
CAS Number
7440144   
99+
7440133   
99+
Space Group Name
Im_ 3m   
I4/mmm   
Space Group Number
229.00   
1
139.00   
8
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