13 Al 알루미늄 26.982 u

알루미늄

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주기
3
13
블록
p-블록
상 (표준 상태)
Solid

알루미늄은 지각에서 가장 풍부한 금속이다. 가볍고 내식성이 좋아 포장재와 운송 분야에 널리 쓰인다.

외관: 은회색 금속

알루미늄 개요

The most abundant metal in Earth's crust, aluminum is a silvery post-transition metal of atomic number 13 and atomic mass 26.982. It is light at 2.70 g/cm³ and resistant to corrosion, melting at 933 K. Three valence electrons ([Ne] 3s2 3p1) give an electronegativity of 1.61 and a comparatively low first ionization energy of 578 kJ/mol. Hans Christian Ørsted first produced the metal in 1825. Its combination of low weight and corrosion resistance underlies its wide use in packaging and transportation. Aluminum does not occur free in nature, and it sits in group 13, period 3, below boron.

물리적 성질

원자 질량 26.982 u
밀도 2.7 g/cm³
녹는점 660.3 °C
끓는점 2469.8 °C
표준 상태에서의 상 Solid
원자 반지름 118.0 pm

전자적 성질

전기 음성도 1.61
이온화 에너지 577.5 eV
전자 친화도 42.5 eV
원자가 전자 3

전자 배치

배치 [Ne] 3s² 3p¹

전자껍질 배치

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

주기율표에서의 위치

주기율표에서 알루미늄의 위치 Al

발견

발견자: Hans Christian Oersted
연도: 1825

알루미늄을(를) 포함하는 화합물

Science FYI에서 더 보기

Frequently Asked Questions

What is 알루미늄?
알루미늄 (Al) is a chemical element with atomic number 13. It is a solid at standard temperature and pressure, classified as a 전이후 금속.
What are the key properties of 알루미늄?
알루미늄 has an atomic mass of 26.982 u, density of 2.7 g/cm³, melting point of 660.3°C, boiling point of 2469.8°C.
What is the electron configuration of 알루미늄?
The electron configuration of 알루미늄 is [Ne] 3s2 3p1. It is in the p-block of the periodic table.
Who discovered 알루미늄?
알루미늄 was discovered by Hans Christian Oersted in 1825.
What is the electronegativity of 알루미늄?
알루미늄 has an electronegativity of 1.61 on the Pauling scale.