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Niobium and Protactinium Periodic Table

Niobium
Protactinium
Protactinium and Niobium in Periodic Table


Periodic Table
Symbol
Nb   
Pa   
Group Number
5   
13
Not Available   
Period Number
5   
7   
Block
d block   
f block   
Element Family
Transition Metal   
Actinide   
CAS Number
7440031   
99+
7440133   
99+
Space Group Name
Im_ 3m   
I4/mmm   
Space Group Number
229.00   
1
139.00   
8
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