86 Rn 라돈 222.0 u

라돈

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주기
6
족
18
블록
p-블록
상 (표준 상태)
Gas

라돈은 라듐의 붕괴로 생성되는 방사성 비활성 기체이다. 비흡연자 폐암의 가장 큰 원인이다.

라돈 개요

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.

물리적 성질

원자 질량 222.0 u
표준 상태에서의 상 Gas

전자적 성질

전기 음성도 2.2

전자 배치

배치 [Xe] 4f¹⁴ 5d¹⁰ 6s² 6p⁶

전자껍질 배치

라돈의 전자껍질 배치 Rn 2e⁻ 8e⁻ 18e⁻ 32e⁻ 18e⁻ 8e⁻
라돈의 전자껍질 구조 — 껍질별 전자 수.
껍질 전자
1 (K) 2
2 (L) 8
3 (M) 18
4 (N) 32
5 (O) 18
6 (P) 8

주기율표에서의 위치

주기율표에서 라돈의 위치 Rn

블록 & 주기

블록

s p d f

주기

1 2 3 4 5 6 7

주기율표

란타넘족 악티늄족

Rn가 포함된 반응

라돈-222의 알파 붕괴

²²²Rn → ²¹⁸Po + ⁴He

핵

라듐-226의 알파 붕괴

²²⁶Ra → ²²²Rn + ⁴He

핵

더 많은 비활성 기체

2 He 헬륨 10 Ne 네온 18 Ar 아르곤 36 Kr 크립톤 54 Xe 제논

Frequently Asked Questions

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