Definition

1. Noun:
   • Hydrogen: A chemical element (symbol H), the lightest and most abundant element in the universe. Historically, it was called "khinh khí" in Vietnamese because it is lighter ("khinh") than air ("khí").

Usage Examples

• Noun:
  • Khinh khí là nguyên tố nhẹ nhất. (Hydrogen is the lightest element.)
  • Bong bóng bay chứa đầy khinh khí. (The balloon is filled with hydrogen.)

Advanced Usage

• "bom khinh khí": hydrogen bomb.
  • Bom khinh khí có sức công phá khủng khiếp. (The hydrogen bomb has terrifying destructive power.)

Variants and Related Words

• Hi-đrô (noun): The modern, more common Vietnamese term for hydrogen, derived from the international scientific name.
  • Nhiên liệu hi-đrô đang được nghiên cứu. (Hydrogen fuel is being researched.)

Synonyms

• Hi-đrô (noun): Hydrogen.

Notes on Usage

• "Khinh khí" is an older, literary, or historical term for hydrogen. In modern scientific and everyday contexts, "hi-đrô" is the standard and preferred term. "Khinh khí" is still understood and may be encountered in historical texts or fixed phrases like "bom khinh khí" (hydrogen bomb).

noun

1. hydrogen
   • bom khinh khí
     hydrogen bomb