helium Synonyms

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