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词汇 atom
释义 atom
noun[ C ]
uk /ˈæt.əm/ us /ˈæt̬.əm/
B2
the smallest unit of any chemical element, consisting of a positive nucleus surrounded by negative electrons. Atoms can combine to form a molecule: 原子
A molecule of carbon dioxide (CO2) has one carbon atom and two oxygen atoms.二氧化碳(CO2)分子是由一个碳原子和两个氧原子构成的。
figurativeHe hasn't an atom of sense (= he has no sense), that boy.那个孩子啊,一点头脑也没有。
 
Digital Art/The Image Bank/GettyImages
The nucleus of a deuterium atom contains a proton and a neutron.重氢的原子核由一个质子和一个中子组成。
Scientists are working to harness the power of the atom.科学家们正在研究如何利用原子能。
SMART Vocabulary: related words and phrases

Physics: atoms, molecules & sub-atomic particles
acceptor
alpha particle
anti-radical
antilepton
antimatter
antineutrino
benzene ring
beta decay
beta particle
hadron
Higgs boson
interatomic
interelectronic
interionic
molecularly
monatomic
multi-molecular
multiparticle
muon
positron

atom | American Dictionary


atom
noun[ C ]
us/ˈæt̬·əm/
physics
the smallest unit of any chemical element, consisting of a positive nucleus surrounded by negative electrons. Atoms can combine to form a molecule.

Examples of atom


atom
The excited atom interacts with the vacuum fluctuations which cause the spontaneous emission of radiation.
It is commonly supposed that any explicit numerical method with fixed time-step is destabilized by a sufficiently large velocity of any particular atom.
The pulse duration may introduce an additional laser-related timescale whereas the energy spectrum of the atom, through typical transitions, could introduce an additional species-related timescale.
Unlike traditional partial deduction, which considers only atoms for partial deduction, conjunctive partial deduction attempts to specialize entire conjunctions of atoms.
Excited atoms and electrons are taken as the variables of the system.
The main interest is in characterizing how precisely we can 'bound' the probabilities associated with various atoms.
However, the difference in precision is only for inadmissible atoms.
First, generalisation induces precision loss, even to the extent that the generalised atom has a different characteristic tree.
For definite programs, the consensus amongst these authors is that the minimum model is the meaning (the set of true atoms).
Random matrix history started in the physics of heavy atoms and multivariate statistics.
To achieve this, we have endowed aggregate atoms with data structures similar to those used in rules.
His flowing graphism is not only an elegant record of the physical movement of the artist's hand, but a symbol of the motion of atoms.
Ionization of atoms in an alternating electric field.
Here they knock out electrons from inner electronic shells of the atoms, producing core holes.
In inter-atomic relations, the fundamental role is held by outer-shell electrons, pertaining to the outermost orbital of bonding atoms.
These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors.

Collocations withatom


atom

These are words often used in combination with atom.

Click on a collocation to see more examples of it.


carbon atom
The hybrid was of two different kinds of orbitals combined to produce the characteristics of a carbonatom.
chlorine atom
This is because the atomic radius of an atom of iodine is much larger than that of a chlorineatom.
From
Wikipedia

This example is from Wikipedia and may be reused under a CC BY-SA license.
component atom
This is a list of molecules that have been detected in the interstellar medium and circumstellar envelopes, grouped by the number of component atoms.
From
Wikipedia

This example is from Wikipedia and may be reused under a CC BY-SA license.
These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors.
See all collocations with atom
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