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Protactinium and Actinium Periodic Table

Protactinium
Actinium
Actinium and Protactinium in Periodic Table


Periodic Table
Symbol
Pa   
Ac   
Group Number
Not Available   
Not Available   
Period Number
7   
7   
Block
f block   
f block   
Element Family
Actinide   
Actinide   
CAS Number
7440133   
99+
7440348   
99+
Space Group Name
I4/mmm   
Fm_ 3m   
Space Group Number
139.00   
8
225.00   
2
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