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Radium
Radium

Thallium
Thallium



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Thallium

Radium and Thallium Periodic Table

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Periodic Table

Symbol

Ra
Tl

Group Number

213
0 17
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Period Number

76
2 7
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Block

s block
p block

Element Family

Alkaline Earth
Post-​Transition

CAS Number

74401447440280
7429905 54386242
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Space Group Name

Im_ 3m
P63/mmc

Space Group Number

229.00194.00
11 276
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