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Erbium
Erbium

Roentgenium
Roentgenium



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Erbium and Roentgenium Periodic Table

Periodic Table

Symbol

Er
Rg

Group Number

311
0 17
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Period Number

67
2 7
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Block

f block
d block

Element Family

Lanthanide
-

CAS Number

744052054386242
7429905 54386242
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Space Group Name

P63/mmc
-

Space Group Number

194.00194.00
11 276
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