百度试题 结果1 题目The atomic number of an element represents the number of ___. A. protons B. neutrons C. electrons D. protons and neutrons 相关知识点: 试题来源: 解析 A。元素的原子序数代表质子数(protons)。反馈 收藏
A. the number of protons in an atom B. the number of neutrons in an atom C. the number of electrons in an atom D. the total number of particles in an atom 相关知识点: 试题来源: 解析 A。元素的原子序数告诉我们一个原子中的质子数。原子序数等于质子数,选项 B 中子数不能由原子序数确...
Atomic number, the number of a chemical element in the periodic system, whereby the elements are arranged in order of increasing number of protons in the nucleus. Accordingly, the number of protons, which is always equal to the number of electrons in a n
An atomic number of an element is the number of protons in all the atoms of that element. Atomic numbers are always whole numbers greater than zero, such as 1,2,3... since an atom cannot have a fractional number of protons. What is the difference between an atomic number and a mass ...
as the weight of one-twelfth of the mass of a carbon-12 atom considering that it is at rest. since protons and neutrons account for almost all of the mass of the given atom, the atomic mass of a given element is almost equal to its mass number. what is the atomic mass of elements...
This number can typically be found on a periodic table above the symbol in an element's box. The number of protons in an atom is similar to the DNA of a human; it is responsible for giving the atom its most notable characteristics. The atomic numbers of some of the most famous atoms ...
atomic number的中文解释 沪江词库精选atomic number是什么意思、英语单词推荐、用法及解释 名词[化]原子序数(指元素在周期表中按次序排列的序号) 英语解释 the order of an element in Mendeleyev's table of the elements; equal to the number of protons in the nucleus or electrons in the neutral state of...
An atom consists of a nucleus, which contains protons and neutrons, surrounded by electrons. The number of protons determines the element of the atom, while the number of neutrons can vary. Electrons exist in energy levels or shells around the nucleus. 开学特惠 开通会员专享超值优惠 助力考试高...
The total number of protons in the nucleus of an atom gives us the atomic number of that atom. It is represented with the letter ‘Z.’ All the atoms of a particular element have the same number of protons, and hence the same atomic number. Atoms of different elements have different ato...