氩
氩（Ar）的原子序数为 18，位于第 3 周期、第 18 族。
- 原子序数
- 18
- 符号
- Ar
- Also known as
- Ar, 氩, 氬, 氩元素, 氬元素
概览
Argon provides low-reactivity protective atmospheres for welding and semiconductor processing.
Identifiers
- 原子序数
- 18
- 符号
- Ar
- Also known as
- Ar, 氩, 氬, 氩元素, 氬元素
性质
- 周期
- 3
- 族
- 18
- 类别（PubChem）
- 稀有气体
参考文献
- PubChem Periodic Table: element dataNational Center for Biotechnology Information · PubChem
Retrieved 2026-09-16. Supplies all 118 atomic numbers, symbols, English names and reference categories. Atomic masses and state predictions are not imported as molecular properties.
- Periodic Table of ElementsInternational Union of Pure and Applied Chemistry · IUPAC
the separately displayed lanthanoid and actinoid series.的参考文献 for accepted element names, symbols and periodic placement. Group numbers are omitted
- IUPAC化学元素周期表（中文版）中国化学会 · Chinese Chemical Society · 2019
Simplified-Chinese element names and periodic-table positions checked against the January 2019 source.
- 化學名詞—化學元素一覽表國家教育研究院化學名詞審譯委員會 · National Academy for Educational Research · 2017
Official 2017 revised list redistributed by 臺南市立將軍國民中學. The attached 20170818化學元素表.doc was downloaded and all 118 number/symbol/name rows checked. Component glyph descriptions are represented by their Unicode characters; documented regional names are retained as search aliases.
- It's Elemental: ArgonThomas Jefferson National Accelerator Facility · Jefferson Lab, U.S. Department of Energy
Element-use and material context checked in the source annotations supplied by the PubChem element page on 2026-09-16. No preparation instructions, current production quantities or medical advice are imported.
- Accessing the Chemical Elements Data from PubChemSunghwan Kim · IUPAC FAIR Chemistry Cookbook · 2024
Documents the PubChem element-data service, its 118-row coverage and derivation of periods from atomic numbers.