noun🔗ShareThe chemical element (symbol Ar) with an atomic number of 18. The third most abundant gas in the Earth's atmosphere, it is a colourless, odourless, inert noble gas."Many light bulbs are filled with argon to prevent the filament from burning out quickly. "elementchemistrysubstanceChat with AIVocabulary GamePractice Reading
noun🔗ShareA single atom of this element."The lab technician carefully isolated a single argon atom for the experiment. "elementchemistrysubstanceChat with AIVocabulary GamePractice Reading
