18 Ar Argon 39.948 u

Argon

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주기
3
족
18
블록
p-블록
상 (표준 상태)
Gas

Argon is the third most abundant gas in Earth's atmosphere at 0.93%. It is used as an inert shielding gas in welding and lighting.

외관: 무색 기체

물리적 성질

원자 질량 39.948 u
밀도 0.0017837 g/cm³
녹는점 -189.3 °C
끓는점 -185.8 °C
표준 상태에서의 상 Gas
원자 반지름 71.0 pm

전자적 성질

이온화 에너지 1520.6 eV
원자가 전자 8

전자 배치

배치 [Ne] 3s² 3p⁶

Electron Shell Configuration

Argon electron shell configuration Ar 2e⁻ 8e⁻ 8e⁻

Position in Periodic Table

Argon position in the periodic table Ar

발견

발견자: Lord Rayleigh
연도: 1894

블록 & 주기

블록

s p d f

주기

1 2 3 4 5 6 7

주기율표

란타넘족 악티늄족

더 많은 비활성 기체

2 He Helium 10 Ne Neon 36 Kr Krypton 54 Xe Xenon 86 Rn Radon

Frequently Asked Questions

What is Argon?
Argon (Ar) is a chemical element with atomic number 18. It is a gas at standard temperature and pressure, classified as a 비활성 기체.
What are the key properties of Argon?
Argon has an atomic mass of 39.948 u, density of 0.0017837 g/cm³, melting point of -189.3°C, boiling point of -185.8°C.
What is the electron configuration of Argon?
The electron configuration of Argon is [Ne] 3s2 3p6. It is in the p-block of the periodic table.
Who discovered Argon?
Argon was discovered by Lord Rayleigh in 1894.