The mass number of argon is 40.How many protons, neutrons and electrons are there in an argon atom? ( ) 相关知识点: 试题来源: 解析 一个氩原子有 18 个质子、22 个中子和 18 个电子。 1. 原子序数: 氩的原子序数为 18,这意味着它的原子核中有 18 个质子。 2. 质量数: 氩的质量数为 40...
Argon has a freezing point of -189.2°C, boiling point of -185.7°C, and density of 1.7837 g/l. Argon is considered to be a noble or inert gas and does not form true chemical compounds, although it does form a hydrate with a dissociation pressure of 105 atm at 0°C. Ion molecules ...
Atomic number 18 Atomic weight 39.948 amu Standard state Gas at 298 K CAS Registry ID 7440-37-1 Group in periodic table 18 Group name Noble gas Period in periodic table 3 Block in periodic table p-block Color Colorless Classification Non-metallic Melting point 83.80 K (-189.35°C or -308.8...
Argon is a chemical element; it has symbol Ar and atomic number 18. It is in group 18 of the periodic table and is a noble gas.[7] Argon is the third-most abundant gas in Earth's atmosphere, at 0.934% (9340 ppmv). It is more than twice as abundant as water vapor (which ...
atomic number 18 atomic weight [39.792, 39.963] melting point −189.2 °C (−308.6 °F) boiling point −185.7 °C (−302.3 °F) density (1 atm, 0° C) 1.784 g/litre oxidation state 0 electron config. 1s22s22p63s23p6 In cosmic abundance, argon ranks approximately 12th among the...
MDL Number: MFCD00003431 MOL File: 7440-37-1.mol MSDS File: SDS Last updated:2024-12-18 13:37:16 Request For Quotation Argon Properties Melting point-189.2 °C(lit.) Boiling point-185.7 °C(lit.) Density1.784(0℃) vapor density1.38 (21 °C, vs air) ...
Spatially resolved radial distributions of excitation temperature and electron number density in an argon ICP were obtained. The argon excitation temperatu... H Uchida,K Tanabe,Y Nojiri,... - 《Spectrochimica Acta Part B Atomic Spectroscopy》 被引量: 244发表: 1981年 Spectroscopic measurement of el...
Atomic number: 18 Group numbers: 18 Period: 3 Electronic configuration: [Ne] 3s2 3p6 Formal oxidation number: 0 Electronegativities: - Atomic radius / pm: 188 Relative atomic mass: 39.948(1)Argon was discovered by Lord Raleigh and Sir William Ramsay (GB) in 1894. The origin of the ...
This increase in density was attributed to the presence of another element in the sample. This heavier element was then extracted from the sample of nitrogen through further fractional distillation and then identified as the new element, argon. The pair were also the first scientists to discover ...
Here's a collection of useful and interesting argon facts. Argon is the noble gas with element atomic number 18 with element symbol Ar.