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atom

英 [ˈætəm]

美 [ˈætəm]

n.  原子

复数:atoms 

高考CET4CET6考研TOEFLTEM4TEM8计算机

Oxford 3000 / Collins.2 / BNC.4241 / COCA.5184

牛津词典

    noun

    • 原子
      the smallest part of a chemical element that can take part in a chemical reaction
      1. the splitting of the atom
        原子的分裂
      2. Two atoms of hydrogen combine with one atom of oxygen to form a molecule of water.
        两个氢原子和一个氧原子结合组成一个水分子。

    柯林斯词典

    • N-COUNT 原子
      Anatomis the smallest amount of a substance that can take part in a chemical reaction.
      1. A methane molecule is composed of one carbon atom attached to four hydrogens.
        甲烷分子由1个碳原子与4个氢原子构成。

    英英释义

    noun

    • (nontechnical usage) a tiny piece of anything
        Synonym:moleculeparticlecorpusclemotespeck
      1. (physics and chemistry) the smallest component of an element having the chemical properties of the element

        双语例句

        • In this model the arrangement of bonds around the central atom is considered to depend upon how many valence-shell electron pairs.
          在这个模型中,认为围绕中心原子的化学键的排列取决于价层中电子对的数量。
        • The chief differences between chlorophyll and heme are the presence of a magnesium atom in the center of the porphyrin ring.
          叶绿素和血红素之间的主要的差别为在卟啉环中心存在一个镁原子。
        • This simple molecule consists of one oxygen atom and two hydrogen atoms.
          这个简单的水分子由一个氧原子和两个氢原子构成。
        • Each of the four valency electrons of the carbon atom is shared with one of a hydrogen atom.
          碳原子的四个价电子都各与氢原子的一个价电子共用。
        • The anion OH having one oxygen and one hydrogen atom.
          含一个氧原子和一个氢原子的OH负离子。
        • So there's one electron in each hydrogen atom.
          所以每个氢原子中有两个电子。
        • This is a one electron atom.
          这里有一个单电子原子。
        • We will consider this Zeeman effect for the hydrogen atom.
          我们将对氢原子考虑此塞曼效应。
        • Water is spoken of as containing two atoms of hydrogen and one atom of oxygen.
          人们说水含有两个氢原子和一个氧原子。
        • There isn't atom of sense in what you say.
          你所说的话没有道理。