4 Be 베릴륨 9.0122 u

베릴륨

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주기
2
2
블록
s-블록
상 (표준 상태)
Solid

베릴륨은 강성이 큰 가벼운 알칼리 토금속이다. 항공우주 소재와 X선 창에 쓰인다.

외관: 흰색-회색 금속

베릴륨 개요

Isolated in principle by Louis Nicolas Vauquelin in 1798, beryllium is a hard, white-gray alkaline earth metal with atomic number 4 and an atomic mass of 9.01. It is light yet stiff, with a density of 1.85 g/cm³ and a high melting point of 1560 K. Two valence electrons in the [He] 2s2 configuration give an electronegativity of 1.57 and a first ionization energy of 900 kJ/mol. Beryllium is transparent to X-rays, which suits it to radiation windows, and its rigidity relative to weight makes it valuable in aerospace materials. Placed in group 2, period 2, the free metal does not occur naturally and must be extracted from minerals.

물리적 성질

원자 질량 9.0122 u
밀도 1.85 g/cm³
녹는점 1286.8 °C
끓는점 2468.8 °C
표준 상태에서의 상 Solid
원자 반지름 112.0 pm

전자적 성질

전기 음성도 1.57
이온화 에너지 899.5 eV
원자가 전자 2

전자 배치

배치 [He] 2s²

전자껍질 배치

베릴륨의 전자껍질 배치 Be 2e⁻ 2e⁻
베릴륨의 전자껍질 구조 — 껍질별 전자 수.
껍질 전자
1 (K) 2
2 (L) 2

주기율표에서의 위치

주기율표에서 베릴륨의 위치 Be

발견

발견자: Louis Nicolas Vauquelin
연도: 1798

베릴륨을(를) 포함하는 화합물

Science FYI에서 더 보기

Frequently Asked Questions

What is 베릴륨?
베릴륨 (Be) is a chemical element with atomic number 4. It is a solid at standard temperature and pressure, classified as a 알칼리 토금속.
What are the key properties of 베릴륨?
베릴륨 has an atomic mass of 9.0122 u, density of 1.85 g/cm³, melting point of 1286.8°C, boiling point of 2468.8°C.
What is the electron configuration of 베릴륨?
The electron configuration of 베릴륨 is [He] 2s2. It is in the s-block of the periodic table.
Who discovered 베릴륨?
베릴륨 was discovered by Louis Nicolas Vauquelin in 1798.
What is the electronegativity of 베릴륨?
베릴륨 has an electronegativity of 1.57 on the Pauling scale.