What element has the symbol 'He'?

The story behind the answer

He is the symbol for Helium, the noble gas with atomic number 2. The other options have different symbols: Hydrogen is H, Hafnium is Hf, and Holmium is Ho.

Helium was first identified in the Sun’s spectrum in 1868—its name comes from Helios, the Greek sun god. It’s colorless, inert, and lighter than air, which is why it fills balloons and airships, and its ultra-low boiling point makes it crucial for cooling MRI magnets. Memory tip: the periodic table starts H, He, Li—so after Hydrogen (H) comes Helium (He). Or think “He = Helium = the gas that makes voices squeaky,” linking the symbol to a familiar effect.