Polonium and Erbium Periodic Table
Periodic Table
Symbol
Po
Er
Group Number
16
2
Not Available
Period Number
6
6
Block
p block
f block
Element Family
Post-Transition
Lanthanide
CAS Number
7440086
99+
7440520
35
Space Group Name
Pm-3m
P63/mmc
Space Group Number
221.00
3
194.00
5
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