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英英字典: atomic_number_1

atomic number 1   (TTS Sound)



Overview of noun atomic_number_1

The noun atomic number 1 has 1 sense


  • hydrogen, H, atomic number 1 -- (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)

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