百度试题 结果1 题目The atoms of the elements in a compound are combined in whole number ratio, not in fractional parts of an atom.相关知识点: 试题来源: 解析 化合物中各个元素的原子以整数比的形式组成,而不是以某个原子的小数形式。
书上说element是由一种atom组成的然后有的atom连接在一起成为了molecule就是说element是由一种atom或者molecule组成的吗结果一 题目 英语翻译elements are substances made up of only one kind of atom.atoms of an element all contain the same number of protons.elements can be classified according to the pa...
1. The Elements and The Periodic Table(元素和周期表) The number of protons in the nucleus of an atom is referred to as the atomic number, or proton number, Z. The numbers of electrons in an electrically neutral atom is also equal to the atomic number, Z. The total mass of an atom ...
In these atoms, the positive and negative charges cancel each other out, leading to an atom with no net charge.Accounting for the sizes of protons, neutrons, and electrons, most of the volume of an atom—greater than 99 percent—is, in fact, empty space. With all this empty space, ...
the years, scientists have designed many different models for this structure. Each one was the best model at the time, but as new evidence was discovered, the models were revised. Scientists will probably revise the current model as more evidence becomes available. What’s inside of an atom?
可数名词 An element is a substance such as gold, oxygen, or carbon that consists of only one type of atom. 元素 6 可数名词 The element in an electric or water heater is the metal part that changes the electric current into heat. 电阻丝 7 复数型名词 You can refer to the weather, ...
Nuclear fission is the splitting of the nucleus of an atom. Only a few elements are suitable for use in this way, the most important ones being Uranium-235, Uranium-233, and Plutonium- When a nucleus of one of these elements is struck by a free neutron it breaks down into two lighter...
•Atomshaveanucleus.•Thenucleusislocatedinthecenteroftheatom.•Thenucleusiscomposedofprotonsandneutrons.ATOM Let’stakeacloserlookatthenucleusofanatom...•Thenucleusiscomposedof2particles.1.Protons:positivelychargedparticles-depictedindiagramsas:p+or+2.Neutrons:particleswithnocharge-depictedindiagramsas...
Atoms are the basis of all the elements in the universe, the building blocks of all visible matter, and the secret to nuclear power.
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