86 Rn Radon 222,0 u

Radon

Período
6
Grupo
18
Bloco
p-bloco
Fase (STP)
Gas

Radon is a radioactive noble gas formed from the decay of radium. It is the leading cause of lung cancer among non-smokers.

About Radon

Radon forms wherever radium decays, which places this radioactive noble gas in soils, rock and building foundations across large parts of the inhabited surface. It is element 86, with a relative atomic mass of 222.0 and the closed-shell configuration [Xe] 4f14 5d10 6s2 6p6 that terminates period 6 in group 18. Its electronegativity is given as 2.2, and unlike the other elements of its period it is a gas at standard temperature and pressure. Public-health significance follows directly from that volatility: radon accumulates in enclosed indoor air, and prolonged exposure makes it the leading cause of lung cancer among people who have never smoked. Mitigation therefore centres on ventilation and on sealing the pathways by which soil gas enters a building.

Propriedades físicas

Massa atômica 222.0 u
Fase em STP Gas

Propriedades eletrônicas

Eletronegatividade 2.2

Configuração eletrônica

Configuração [Xe] 4f¹⁴ 5d¹⁰ 6s² 6p⁶

Electron Shell Configuration

Radon electron shell configuration Rn 2e⁻ 8e⁻ 18e⁻ 32e⁻ 18e⁻ 8e⁻
Electron shell structure of Radon — electrons per shell.
Shell Electrons
1 (K) 2
2 (L) 8
3 (M) 18
4 (N) 32
5 (O) 18
6 (P) 8

Position in Periodic Table

Radon position in the periodic table Rn

Bloco e período

Bloco

s p d f

Período

1 2 3 4 5 6 7

Tabela Periódica

Lantanídeos Actinídeos

Reações envolvendo Rn

Alpha Decay of Radium-226

²²⁶Ra → ²²²Rn + ⁴He

Nuclear

Alpha Decay of Radon-222

²²²Rn → ²¹⁸Po + ⁴He

Nuclear

Mais Gás Nobre

2 He Helium 10 Ne Neon 18 Ar Argon 36 Kr Krypton 54 Xe Xenon

Frequently Asked Questions

What is Radon?
Radon (Rn) is a chemical element with atomic number 86. It is a gas at standard temperature and pressure, classified as a gás nobre.
What are the key properties of Radon?
Radon has an atomic mass of 222.0 u.
What is the electron configuration of Radon?
The electron configuration of Radon is [Xe] 4f14 5d10 6s2 6p6. It is in the p-block of the periodic table.
What is the electronegativity of Radon?
Radon has an electronegativity of 2.2 on the Pauling scale.