百度试题 结果1 题目Protons and neutrons are known as___ A) Electrons B) Neutrinos C) Nucleons D) Quarks 相关知识点: 试题来源: 解析 C 反馈 收藏
I was about to elaborate further, but I'm seeing now that this analogy is gettingout of hand. I'm leaning to the explanation that the composition of fundamental particles as an arrangement of quarks is NOT analogous to the compsition of nuclei as an arrangement of proton...
By the end of this chapter you should be able to: 1 recognise and describe protons, neutrons and electrons in terms of their relative charges and relative masses; 辨别并描述质子、中子和电子根据它们的相对带电量和相对数量; 2 desctibe the distribution of mass and charge within an atom; 能够...
number of protons = number of neutrons = number of electrons = [3] © UCLES 2020 9702/21/M/J/20 PMT 15 (ii) The particle (ion) X is in the electric field in (a) at a point midway between the plates. Determine the magnitude of the electric force acting on X. force = N [2...
particles of various substances. However, with the help of accumulated knowledge and modern equipments, we gradually get to learn that all matter is comprised of atoms which are further comprised of protons, neutrons and electrons. Recent researches has discovered an even more basic unit called ...
and used to explore the spatial-time information of the non-clustering Woods-Saxon spherical structure as well as theα-clustering structures of^12C or^16O based on an extended quantum molecular dynamics model.The emission time sequence of neutrons and protons is indicated by the ratio of ...
The measured signals of the electron-induced photoneutrons are well reproduced by using the Particle and Heavy Ion Transport code System. The results obtained provide useful approach for analyzing the various laser based ion beams. 展开 关键词: Neutrons Protons Acceleration measurement Laser plasma ...
All elements in the periodic table are made of subatomic particles. These are protons, neutrons and electrons. The protons and neutrons are found in the centre of the atom, which makes up the atomic nucleus.Answer and Explanation: Become a member and unlock all Study Answers Try it risk-...
引导非限制性定语从句，说明整个主句，科技英语中常见这种用法，如：Neutrons,astheirnamessuggest,areneutralparticles.(顾名思义，中子是中性的粒子)Asismentionedabove,theadditionofalloyingelementsismadetoimprovethemechanicalpropertiesofmetals.(如同上面所提到的那样，通过添加合金元素来改善金属的力学性质)代替整个主句的...
12 A potassium isotope can be shown as:(39)/(19)K What are the numbers of protons, neutrons and electronsin this potassium isotope? A 19 protons, 19 neutrons, 20 electrons B 19 protons, 20 neutrons, 19 electrons C 20 protons, 19 neutrons, 19 electrons D 20 protons, 20 neutrons, ...