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- Name: Radium
- Symbol: Ra
- Atomic number: 88
- Atomic weight: [ 226 ]
- Standard state: solid at 298 K
- CAS Registry ID: 7440-14-4
- Group in Periodic Table: 2
- Group name: Alkaline earth metal
- Period in periodic table: 7
- Block in periodic table: s-block
- Colour: metallic
- Classification: Metallic
- Name: Rutherfordium
- Symbol: Rf
- Atomic number: 104
- Atomic weight: [ 267 ]
- Standard state: presumably a solid at 298 K
- CAS Registry ID: 53850-36-5
- Group in periodic table: 4
- Group name: (none)
- Period in periodic table: 7
- Block in periodic table: d-block
- Colour: unknown, but probably metallic and silvery white or grey in appearance
- Classification: Metallic
- Name: Roentgenium
- Symbol: Rg
- Atomic number: 111
- Atomic weight: [ 280 ]
- Standard state: presumably a solid at 298 K
- CAS Registry ID: 54386-24-2
- Group in periodic table: 11
- Group name: (none)
- Period in periodic table: 7
- Block in periodic table: d-block
- Colour: unknown, but probably metallic and silvery white or grey in appearance
- Classification: Metallic
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