Berkelium and Actinium Periodic Table
Periodic Table
Symbol
Bk
Ac
Group Number
Not Available
Not Available
Period Number
7
7
Block
f block
f block
Element Family
Actinide
Actinide
CAS Number
7440406
99+
7440348
99+
Space Group Name
P63/mmc
Fm_ 3m
Space Group Number
194.00
5
225.00
2
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