Oganesson boron ← carbon → nitrogen Group group 6 Period period 8 (theoretical, extended table) Block g-block Electron configuration [Rn] 5f^14 6d^4 7s^2^[1] Electrons per shell 2, 8, 18, 32, 18, 9, 2 Physical properties Phase at STP solid (predicted)^[2] Density (near r.t.) 35.0 g/cm^3 (predicted)^[1]^[3] Atomic properties Oxidation states 0, (+3), (+4), (+5), +6^[1]^[4] (parenthesized: prediction) 1st: 757 kJ/mol 2nd: 2352.6 kJ/mol Ionization energies 3rd: 2484 kJ/mol (more) Covalent radius sp^2: 73 pm sp: 69 pm Van der Poel Martin Van Buren Washington White Woodruff Yell