17 Cl 염소 35.45 u

염소

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주기
3
17
블록
p-블록
상 (표준 상태)
Gas

염소는 수질 정화에 널리 쓰이는 반응성이 큰 할로젠이다. 두 번째로 가벼운 할로젠이며 생명에 필수적인 원소이다.

외관: 연한 황록색 기체

염소 개요

A pale yellow-green gas with a sharp odor, chlorine is among the most reactive of the halogens and is used the world over to purify water. It has atomic number 17 and an atomic mass of 35.45, condensing to a liquid at 239 K. Seven valence electrons ([Ne] 3s2 3p5) leave it one short of a stable octet, producing a high electronegativity of 3.16 and a first ionization energy of 1251 kJ/mol. Carl Wilhelm Scheele first produced the gas in 1774. Though hazardous in concentrated form, chlorine is essential to life as the chloride ion. It is the second lightest halogen and sits in group 17, period 3.

물리적 성질

원자 질량 35.45 u
밀도 0.003214 g/cm³
녹는점 -101.5 °C
끓는점 -34.0 °C
표준 상태에서의 상 Gas
원자 반지름 79.0 pm

전자적 성질

전기 음성도 3.16
이온화 에너지 1251.2 eV
전자 친화도 349.0 eV
원자가 전자 7

전자 배치

배치 [Ne] 3s² 3p⁵

전자껍질 배치

염소의 전자껍질 배치 Cl 2e⁻ 8e⁻ 7e⁻
염소의 전자껍질 구조 — 껍질별 전자 수.
껍질 전자
1 (K) 2
2 (L) 8
3 (M) 7

주기율표에서의 위치

주기율표에서 염소의 위치 Cl

발견

발견자: Carl Wilhelm Scheele
연도: 1774

염소을(를) 포함하는 화합물

Frequently Asked Questions

What is 염소?
염소 (Cl) is a chemical element with atomic number 17. It is a gas at standard temperature and pressure, classified as a 할로겐.
What are the key properties of 염소?
염소 has an atomic mass of 35.45 u, density of 0.003214 g/cm³, melting point of -101.5°C, boiling point of -34.0°C.
What is the electron configuration of 염소?
The electron configuration of 염소 is [Ne] 3s2 3p5. It is in the p-block of the periodic table.
Who discovered 염소?
염소 was discovered by Carl Wilhelm Scheele in 1774.
What is the electronegativity of 염소?
염소 has an electronegativity of 3.16 on the Pauling scale.