atomic number 2   (TTS Sound)

The atomic_number_2 has 1 Senses.

• he, helium, atomic number 2
• ヘリウム, He
• a very light colorless element that is one of the six inert gasses; the most difficult gas to liquefy; occurs in economically extractable amounts in certain natural gases (as those found in Texas and Kansas)
• 6個の不活性なガスの一つであるとても軽く無色の要素