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Promethium
Promethium

Polonium
Polonium



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Periodic Table van Promethium en Polonium

Periodiek systeem

Symbool

Group Number

periode Aantal

Blok

element Family

CAS-nummer

Space Group Name

Space Group Number

 
Pm
3
6
f block
lanthanide
7440122
-
194,00
 
Po
16
6
p block
post- Transition
7440086
Pm-3m
221,00