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Promethium
Promethium

Erbium
Erbium



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Promethium
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Erbium

Periodic Table van Promethium en Erbium

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Periodiek systeem

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Pm
Er

Group Number

33
0 17
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periode Aantal

66
2 7
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Blok

f block
f block

element Family

lanthanide
lanthanide

CAS-nummer

74401227440520
7429905 54386242
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Space Group Name

-
P63 / mmc

Space Group Number

194,00194,00
11 276
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