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Promethium and Thorium Periodic Table
f
Promethium
Thorium
Thorium and Promethium in Periodic Table
Summary
Periodic Table
Facts
Uses
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Periodic Table
Symbol
Pm
Th
Group Number
3
15
0
18
Period Number
6
7
Block
f block
f block
Element Family
Lanthanide
Actinide
CAS Number
7440122
99+
7440326
99+
Space Group Name
-
P63/mmc
Space Group Number
194.00
7
194.00
7
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Compare Lanthanide Series
Promethium vs Holmium
Promethium vs Lutetium
Promethium vs Praseodymium
Lanthanide Series
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