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Niobium
Niobium

Polonium
Polonium



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Polonium

Niobium and Polonium Periodic Table

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Periodic Table

Symbol

Nb
Po

Group Number

516
0 17
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Period Number

56
2 7
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Block

d block
p block

Element Family

Transition Metal
Post-​Transition

CAS Number

74400317440086
7429905 54386242
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Space Group Name

Im_ 3m
Pm-3m

Space Group Number

229.00221.00
11 276
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