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Protactinium
Protactinium

Niobium
Niobium



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Periodic Table van Protactinium en Niobium

Periodiek systeem

Symbool

Pa
Nb

Group Number

35
0 17
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periode Aantal

75
2 7
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Blok

f block
d block

element Family

actinide
Transition Metal

CAS-nummer

74401337440031
7429905 54386242
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Space Group Name

I4 / mmm
Im_ 3m

Space Group Number

139,00229,00
11 276
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