helium Synonyms

He atomic number 2 europium dysprosium hafnium radon francium plutonium cesium xenon lawrencium fermium noble gas inert gas astatine chemical element curium berkelium light gas balloon gas helius trihelium e939 helios helio dry ice packaging gas freezing mixture carbon dioxide einsteinium californium 2 tellurium silicon cobalt chromium chlorine cerium carbon calcium cadmium butane bromine boron beryllium asparagus arsenic argon ammonia copper