Roentgenium and Erbium Periodic Table
Periodic Table
Symbol
Rg
Er
Group Number
11
7
Not Available
Period Number
7
6
Block
d block
f block
Element Family
Unknown
Lanthanide
CAS Number
54386242
1
7440520
35
Space Group Name
Not Available
P63/mmc
Space Group Number
194.00
5
194.00
5
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