33 As 비소 74.922 u

비소

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주기
4
15
블록
p-블록
상 (표준 상태)
Solid

비소는 고대부터 알려진 준금속으로 역사적으로 독으로 악명 높았다. 반도체와 목재 방부제에 쓰인다.

외관: 금속 회색

비소 개요

Known since antiquity and historically notorious as a poison, arsenic is a metallic-grey metalloid of atomic number 33 and atomic mass 74.922. It is a brittle solid with a density of 5.73 g/cm³. Five valence electrons ([Ar] 3d10 4s2 4p3) give an electronegativity of 2.18 and a first ionization energy of 947 kJ/mol. Albertus Magnus is credited with describing the element around 1250. Despite its toxicity, arsenic has practical uses in semiconductors and, historically, in wood preservatives. It sits in group 15, period 4, sharing that group with nitrogen and phosphorus.

물리적 성질

원자 질량 74.922 u
밀도 5.727 g/cm³
녹는점 816.9 °C
끓는점 613.9 °C
표준 상태에서의 상 Solid
원자 반지름 114.0 pm

전자적 성질

전기 음성도 2.18
이온화 에너지 947.0 eV
전자 친화도 78.2 eV
원자가 전자 5

전자 배치

배치 [Ar] 3d¹⁰ 4s² 4p³

전자껍질 배치

비소의 전자껍질 배치 As 2e⁻ 8e⁻ 18e⁻ 5e⁻
비소의 전자껍질 구조 — 껍질별 전자 수.
껍질 전자
1 (K) 2
2 (L) 8
3 (M) 18
4 (N) 5

주기율표에서의 위치

주기율표에서 비소의 위치 As

발견

발견자: Albertus Magnus
연도: 1250

비소을(를) 포함하는 화합물

Frequently Asked Questions

What is 비소?
비소 (As) is a chemical element with atomic number 33. It is a solid at standard temperature and pressure, classified as a 준금속.
What are the key properties of 비소?
비소 has an atomic mass of 74.922 u, density of 5.727 g/cm³, melting point of 816.9°C, boiling point of 613.9°C.
What is the electron configuration of 비소?
The electron configuration of 비소 is [Ar] 3d10 4s2 4p3. It is in the p-block of the periodic table.
Who discovered 비소?
비소 was discovered by Albertus Magnus in 1250.
What is the electronegativity of 비소?
비소 has an electronegativity of 2.18 on the Pauling scale.