The name Helium originates from the Greek word 'helios' meaning the sun.
Helium has the lowest melting point and boiling point of the elements, so it only exists as a gas except under extreme conditions.
Helium is the second-least reactive noble gas
Inhaling helium temporarily changes the sound of a person's voice.
Evidence of helium's existence came from observation of a yellow spectral line from the sun.
No comments:
Post a Comment