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Osmium
Osmium

Actinium
Actinium



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Osmium and Actinium Periodic Table

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Periodic Table

Symbol

Os
Ac

Group Number

83
0 17
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Period Number

67
2 7
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Block

d block
f block

Element Family

Transition Metal
Actinide

CAS Number

74400427440348
7429905 54386242
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Space Group Name

P63/mmc
Fm_ 3m

Space Group Number

194.00225.00
11 276
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