B) Protons and electronsC) Electrons and neutronsD)Electrons, protons, and neutronsAnswer: A 相关知识点: 试题来源: 解析 A 选项A中的质子和中子位于原子核内,构成了原子的主要质量,而电子的质量极小,可忽略不计。原子质量数即质子数与中子数之和。选项B和C错误地包含了电子,而选项D虽然所有粒子都包含,...
Atomic Structure Uncharged atoms generally contain a nucleus comprising protons and neutrons, surrounded by a cloud of electrons. The protons' positive charge attracts the negative electrons, holding them in orbit. Atomic Mass Atomic mass refers to the weight of the nucleus, which is roughly 1,800...
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-...
The atomic nucleus is one of the densest and most complex quantum-mechanical systems in nature. Nuclei account for nearly all the mass of the visible Universe. The properties of individual nucleons (protons and neutrons) in nuclei can be probed by scattering a high-energy particle from the ...
Atom consist of electrons , protons and neutrons . If the mass attributed to neutron were halved and that attributed to the electrons were doubled , the atomi
百度试题 结果1 题目The total number of protons and neutrons in an atom is calledA.the atomic numberB.the proton numberC.the mass numberD.the neutron number 相关知识点: 试题来源: 解析 C 反馈 收藏
Quick (but challenging) Quiz! 1. The number of protons in the nucleus is… the mass number. the atomic number. the same as the number of neutrons. the total of protons and neutrons. Quick (but challenging) Quiz. 2. The mass number is… the number of protons. the number of neutrons....
The symbol for each atom is identified. Concept Introduction: Mass number : The sum of protons and neutrons gives the value of atomic mass . A (mass number) = no .of protons (P) + no .of neutrons (N) The element symbol : Z A X where, A...
The atomic mass of the element is determined by the combined masses of neutrons and protons. True or false? Explain.Answer and Explanation: The atomic mass or atomic weight of an element (or put it in simple term, mass of an atom) is found by...
Protons are tiny subatomic particles that, along with neutrons, form the nucleus of an atom. The heavier theatom, the more protons (andneutrons) it contains. Hydrogen, which is the lightest element, has a nucleus made from a single proton. The heaviest element in the Periodic Table, which ...