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Actinium and Protactinium Periodic Table


Protactinium and Actinium in Periodic Table


Periodic Table

Symbol
Ac   
Pa   

Group Number
Not Available   
Not Available   

Period Number
7   
7   

Block
f block   
f block   

Element Family
Actinide   
Actinide   

CAS Number
7440348   
99+
7440133   
99+

Space Group Name
Fm_ 3m   
I4/mmm   

Space Group Number
225.00   
2
139.00   
8

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