H

H

H là kí hiệu hóa học của nguyên tố hi-đrô.

Definition

  1. Letter (Noun):

    • The eighth letter of the modern English alphabet and the Latin alphabet, and the eleventh letter of the Vietnamese alphabet.
    • A written or printed representation of this letter.

  2. Symbol (Noun):

    • In chemistry, the symbol for the element hydrogen.
    • In physics, a symbol sometimes used to represent enthalpy or the Hamiltonian.
    • In music, the letter used to denote the note B in German and some other European naming systems.
Usage Examples

  • Letter:

    • Từ "Hà Nội" bắt đầu bằng chữ H. (The word "Hà Nội" begins with the letter H.)
    • Trẻ em học bảng chữ cái: A, B, C, D, E, F, G, H... (Children learn the alphabet: A, B, C, D, E, F, G, H...)

  • Symbol:

    • Công thức hóa học của nước là H₂O. (The chemical formula for water is H₂O.)
    • Ký hiệu H trên bản đồ có thể chỉ bệnh viện. (The symbol H on a map can indicate a hospital.)
Advanced Usage

  • "H-beam" or "H-section": A type of steel beam with a cross-section shaped like the letter 'H', used in construction.

    • Kết cấu nhà kho sử dụng nhiều dầm chữ H. (The warehouse structure uses many H-beams.)

  • "H-index": In academia, a metric that attempts to measure both the productivity and citation impact of a scholar's publications.

    • Giáo sư đó có chỉ số H rất cao. (That professor has a very high H-index.)
Variants and Related Words
  • H+: A symbol used to represent a proton or the hydron ion in chemistry.
  • H-bomb: A common term for a hydrogen bomb.
  • H&M: The name of a global clothing brand, using the initials of its founders (Hennes & Mauritz).
Synonyms
  • Hydrogen: When used as a chemical symbol.
  • Aitch: The name of the letter 'H' in English.
Related Idioms and Expressions

  • "To drop one's aitches": (English idiom) To omit the 'h' sound at the beginning of words, often considered a feature of certain accents or informal speech.

    • Nhân vật trong phim thường bỏ âm H để nghe có vẻ bình dân. (Characters in movies often drop their aitches to sound working-class.)

  • "H-hour": A specific, designated time for the start of a military operation.

    • Mọi việc sẽ bắt đầu vào đúng giờ H. (Everything will commence at H-hour.)