Scientists have()the theory that protons and neutrons are composed of three smaller particles.[单选题] A. kept up with B. put up with C. came up with D. caught up with 相关知识点: 试题来源: 解析 C 正确答案:C 答案解析:come up with意思是“想出,提出”。译:科学家提出了中子和质子由...
Protons and neutronsCottingham formulaThe Cottingham formula expresses the electromagnetic part of the mass of a particle in terms of the virtual Compton scattering amplitude. At large photon momenta, this amplitude is dominated by short distance singularities associated with operators of spin 0 and ...
百度试题 结果1 题目30 years ago, scientists___the theory that protons and neutrons are posed of three smaller particles.相关知识点: 试题来源: 解析 came up with 反馈 收藏
The mass number of argon is 40.How many protons, neutrons and electrons are there in an argon atom? ( ) 相关知识点: 试题来源: 解析 一个氩原子有 18 个质子、22 个中子和 18 个电子。 1. 原子序数: 氩的原子序数为 18,这意味着它的原子核中有 18 个质子。 2. 质量数: 氩的质量数为 40...
The sum of an atom's protons and neutrons is its What nuclide has 27 protons and 33 neutrons? The atomic mass is equal to: A. the number of neutrons. B. the number of protons plus the number of electrons. C. the number of protons plus the number of neutrons. D. the number of el...
Atoms, the basic building blocks of matter, are made of three basic components: protons, neutrons and electrons. The protons and neutrons cluster together to form the nucleus, the central part of the atom, and the electrons orbit about the nucleus. Protons and electrons both carry an ...
题目 The nucleus of the atom is composed of swiftly moving protons and neutrons that are___together by very strong forces. (A) mixed (B) propelled推进(C) pounded打击(D)bound 相关知识点: 试题来源: 解析 held 反馈 收藏
百度试题 结果1 题目4 In which atom is the number of protons equal to the number of neutrons? D A 40Ar B 19 F C 23Na D 16O 相关知识点: 试题来源: 解析 D 反馈 收藏
Atoms were once thought to be the smallest building blocks of the universe, until it was discovered that even they were constructed of building blocks of their own. Those building blocks are protons, electrons and neutrons, and with the advancement of sc
Related to Neutrons:Thermal neutrons,Protons neu·tron (no͞o′trŏn′, nyo͞o′-) n.Abbr.n The electrically neutral nucleon, a baryon composed of two down quarks and one up quark, which has a mass 1,839 times that of an electron, is stable when bound in an atomic nucleus, but...