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Protactinium and Erbium Periodic Table

Protactinium
Erbium
Erbium and Protactinium in Periodic Table


Periodic Table
Symbol
Pa   
Er   
Group Number
Not Available   
Not Available   
Period Number
7   
6   
Block
f block   
f block   
Element Family
Actinide   
Lanthanide   
CAS Number
7440133   
99+
7440520   
35
Space Group Name
I4/mmm   
P63/mmc   
Space Group Number
139.00   
8
194.00   
5
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