What super heavy element starts with the letter R?

Answer 1

• 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