of a chemicalelementin the systematic, ordered sequence shown in theperiodic table. The elements are arranged in order of increasing number of protons in the nucleus of theatom(the same as the number of electrons in the neutral atom), and that number for each element is its atomic number. ...
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Charge of an atom: Each atom has an equal number of protons (+1 charge) and electrons (-1 charge), therefore the overall charge of the atom is 0, or 'neutral'. If one or more electrons are removed then the particle would be positively charged and if one or more additional electrons ...
If you look up an element in the periodic table, you'll see another number next to its atomic number. This is the atomic weight of the element, and it's usually twice the atomic number or more. Atomic weight isn't the same as atomic mass. The atomic mass of an atom is the mass ...
What is the atomic number?Atoms:Atoms are the basic unit of matter. Each atom has a dense nucleus composed of neutrons and protons. It also has a less dense outer electron cloud. Neutral atoms contain the same number of protons and electrons, which are positively and negatively charged, ...
The atomic number (原子序数) is equal to the number of electrons per atom or, what is equivalent, the number of protons (质子) per nucleus.相关知识点: 阅读 文言文阅读 文言题类 文言文阅读——翻译 试题来源: 解析 [答案]原子序数等于每个原子的电子数或者相当于每个原子核的质子数。反馈...
Would you consider a single unit of hydrogen to be an example of an atom? Keep in mind, most hydrogen "atoms" do not have a proton, neutron, and electron. Giventhat the number of protonsdetermines the identity of an element, many scientists consider a single proton to be anatom of the...
How Big Is an Atom? Atoms have great variations in weight, although they are all about the same size. The diameter of an atom is a million times smaller than one strand of thick human hair, very tiny indeed. The diameters of atoms range from approximately 0.1 to 0.5 nanometers. ...
Protons and neutrons have approximately the same mass. However, one proton is about 1,835 times more massive than an electron. Atoms always have an equal number of protons and electrons, and the number of protons and neutrons is usually the same as well. Adding a proton to an atom makes ...
Learn about atoms, the fundamental unit of matter in the universe. Discover the different parts of an atom, such as the nucleus, proton, neutron,...