atom

noun

1. 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。

1. N-COUNT 原子
   An atom is 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。

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。
2. The V2 was not an ordinary weapon: it could only be used against cities. Likewise the atom bomb.
   V2火箭并非普通武器：它只能用于对付城市。原子弹也是这样。
3. A neutron is simply a neutral particle in the nucleus of an atom.
   中子就是原子核里不带电的粒子。
4. Neutrons and protons are bound together in the nucleus of an atom.
   在原子核里，中子和质子是结合在一起的。
5. 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。
6. 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。
7. The power of the atom can be used to produce electricity.
   原子能可以用来发电。
8. There isn't atom of sense in what you say.
   你所说的话没有道理。
9. 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。
10. 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。
11. Superpotent atom Smashers will undertake the quark quest in the1980s.
    超高效的粒子加速器将于80年代投入夸克探索的工作之中。
12. The compact core of the atom begins to appear.
    紧凑的原子内核现身了。
13. 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。
14. So there's one electron in each hydrogen atom.
    所以每个氢原子中有两个电子。
15. This is a one electron atom.
    这里有一个单电子原子。
16. I started by saying, literally: This is an atom; this is a molecule.
    我的第一堂课是这样开始的：这是一个原子；这是一个分子。
17. The atom of lithium is made up of three electrons, three protons and four neutrons.
    锂原子是由三个电子、三个质子和四个中子组成的。
18. 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。
19. We utilize the atoms interact resonantly with a single-mode cavity, and introduce an auxiliary atom.
    提出了一个利用单模腔场和原子的共振相互作用制备团簇态的方案，并引入了辅助原子。
20. 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？
21. 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。
22. We will consider this Zeeman effect for the hydrogen atom.
    我们将对氢原子考虑此塞曼效应。
23. 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。
24. A proton or a neutron has about the same mass as a hydrogen atom.
    质子或中子的质量和氢原子的质量大致相同。
25. 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。
26. 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。
27. 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。
28. A molecule of ammonia is made up of one atom of nitrogen and three atoms of hydrogen.
    氨分子包含一个氮原子和三个氢原子。
29. 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。
30. Ion: Atom or group of atoms with one or more positive or negative electric charges.
    离子：带有一个或多个正电荷（阳离子）或负电荷（阴离子）的原子或原子团。

noun

1. (nontechnical usage) a tiny piece of anything

   Synonym:    moleculeparticlecorpusclemotespeck

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