10 Ne 네온 20.18 u

네온

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주기
2
18
블록
p-블록
상 (표준 상태)
Gas

네온은 네온사인의 밝은 주황빛으로 잘 알려진 비활성 기체이다. 우주에서 다섯 번째로 풍부한 원소이다.

외관: 무색 기체(방전 시 적주황색 빛)

네온 개요

Best known for the reddish-orange light it emits when electrified, neon is an inert noble gas of atomic number 10 and atomic mass 20.18. Its electrons completely fill the second shell ([He] 2s2 2p6), a closed configuration that leaves eight valence electrons, no tendency to bond, and a very high ionization energy of 2081 kJ/mol. The colorless gas liquefies at 27 K. William Ramsay discovered it in 1898. Though neon is the fifth most abundant element in the universe, it is scarce in Earth's air, and its characteristic glow in gas-discharge tubes became the basis of illuminated signage. Neon sits in group 18, period 2.

물리적 성질

원자 질량 20.18 u
밀도 0.0008999 g/cm³
녹는점 -248.6 °C
끓는점 -246.0 °C
표준 상태에서의 상 Gas
원자 반지름 38.0 pm

전자적 성질

이온화 에너지 2080.7 eV
원자가 전자 8

전자 배치

배치 [He] 2s² 2p⁶

전자껍질 배치

네온의 전자껍질 배치 Ne 2e⁻ 8e⁻
네온의 전자껍질 구조 — 껍질별 전자 수.
껍질 전자
1 (K) 2
2 (L) 8

주기율표에서의 위치

주기율표에서 네온의 위치 Ne

발견

발견자: William Ramsay
연도: 1898

Frequently Asked Questions

What is 네온?
네온 (Ne) is a chemical element with atomic number 10. It is a gas at standard temperature and pressure, classified as a 비활성 기체.
What are the key properties of 네온?
네온 has an atomic mass of 20.18 u, density of 0.0008999 g/cm³, melting point of -248.6°C, boiling point of -246.0°C.
What is the electron configuration of 네온?
The electron configuration of 네온 is [He] 2s2 2p6. It is in the p-block of the periodic table.
Who discovered 네온?
네온 was discovered by William Ramsay in 1898.