noun🔗ShareヘリウムThe second lightest chemical element (symbol He) with an atomic number of 2 and atomic weight of 4.002602, a colorless, odorless and inert noble gas."The birthday balloons were filled with helium, which made them float to the ceiling. "誕生日の風船はヘリウムが充填されており、天井に浮かびました。elementchemistrysubstancematerialphysicsscienceChat with AIVocabulary GamePractice Reading
noun🔗ShareヘリウムA form or sample of the element."The science experiment required a sample of helium. "科学実験にはヘリウムのサンプルが必要でした。elementsubstancechemistryChat with AIVocabulary GamePractice Reading
