Sinonimi: Ar | atomic number 18
Inert gas contained in very small quantity in atmosphere, used to fill electric light bulbs.
Colorless, odorless, nonmetallic, gaseous element, symbol Ar, atomic number 18, atomic weight 39.948. It is grouped with the inert gases, since it was long believed not to react with other substances, but observations now indicate that it can be made to combine with boron fluoride to form compounds. It constitutes almost 1% of the Earth's atmosphere, and was discovered 1894 by British chemists John Rayleigh (1842–1919) and William Ramsay after all oxygen and nitrogen had been removed chemically from a sample of air. It is used in electric discharge tubes and argon lasers.A colorless and odorless inert gas; one of the six inert gases; comprises approximately 1% of the earth's atmosphere; SYN. Ar, atomic number 18.
Plemeniti ga, bez boje i mirisa; upotrebljava se za reklamne cevaste lampe (daje plavkasto svetlo).
Element, atomska težina 39,944, redni broj 18, znak Ar, plemeniti (inertni) gas bez boje, mirisa i ukusa, oktriven 1894 g.; upotrebljava se za reklamne lampione i daje sivkastu svetlost; up. neon, kripton, ksenon.