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
• (physics and chemistry) the smallest component of an element having the chemical properties of the element

双语例句

• 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。
• 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。
• 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。
• An atom itself is a complete whole, with its electrons, protons and neutrons and other elements
  一个原子本身就是一个完整的整体，包括电子、质子、中子及其他元素。
• His theory of atom was not sufficient for treatment of large atoms or molecules.
  他的原子理论用于处理大的原子和分子是不能令人满意的。
• So, which atom is in need of those lone pair electrons?
  那么，哪个原子需要这对孤对电子呢？
• An atom normally contains equal numbers of electrons and protons.
  原子在正常情况下含有数目相等的电子和质子。
• A negative ion is an atom which has gained one or more extra electrons.
  获得一个或多个额外电子的原子称为负离子。
• And ion, which is an atom or group of atoms with an electrical charge.
  和离子，它是一个原子或原子的电荷组。
• He patented the idea that the atom could be split
  他获得了“原子可以再分”这一概念的专利权。