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Radium
Radium

Promethium
Promethium



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Promethium

Radium and Promethium Periodic Table

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Periodic Table

Symbol

Group Number

Period Number

Block

Element Family

CAS Number

Space Group Name

Space Group Number

 
Ra
2
7
s block
Alkaline Earth
7440144
Im_ 3m
229.00
 
Pm
3
6
f block
Lanthanide
7440122
-
194.00