atomic number 1   (TTS Sound)

The atomic_number_1 has 1 Senses.

• atomic number 1, hydrogen, h
• H, Ｈ, 水素
• a nonmetallic univalent element that is normally a colorless and odorless highly flammable diatomic gas; the simplest and lightest and most abundant element in the universe
• 通常、無色の、そして、無臭の非常に可燃性の二原子のガスである非金属の一価要素