The meaning of NEUTRON is an uncharged elementary particle that has a mass nearly equal to that of the proton and is present in all known atomic nuclei except the hydrogen nucleus.
A-N; Proton number; neutron number 质子数汉英翻译 proton number 原子序数; 词组短语 中子数与质子数比率 neutron proton ratio 奇质子数同位素 isotope odd-Z 奇质子数核 odd-Z nucleus双语例句 1. The greater the number of protons, the greater is their tendency to blow the nucleus apart. 质子数...
IN 1933 Elsasser 1 pointed out that some of the properties of atomic nuclei correspond to greater stability for certain numbers of neutrons and protons (given the name magic numbers) than for other numbers; the magic numbers for both N (neutron number) and Z (proton number) are 2, 8, 20...
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...
Neutron, neutral subatomic particle that, in conjunction with protons, makes up the nucleus of every atom except ordinary hydrogen (whose nucleus has one proton and no neutrons). Along with protons and electrons, it is one of the three basic particles ma
is positive. The equal positive charge of the proton and the negative charge of the electron cancel each other. Therefore, the atom has no net charge. In a neutral atom, the number of electrons revolving around the nucleus and the number of protons inside the nucleus are equal in number....
However, protons could not be the only particle in the nucleus because the number of protons in any given element (determined by the electrical charge) was less than the weight of the nucleus. Therefore, a third, neutrally charged particle must exist! It wasJames Chadwick, a British physicist...
(seeSection III.D) predicts that repulsion of protons is proportional toZ2but the attraction is proportional to the overall atomic mass,A. Thus, the value ofZ2/Abecomes a measure of the propensity for a given isotope. IfZ2/Ais less than 35, then the critical energy is so large that ...
(atomic number 51) have only 2 stable isotopes apiece. The doubly magicalpha particle, or helium-4 nucleus, composed of two protons and two neutrons, is very stable. In nuclei, this increased stability occurs when there is a largeenergy gapbetween a series of filled energy levels and the ...
Definition:Y_e, electron fraction is de fined as the number of protons per baryon. The Dynamical Ejecta BH-NS并合的动力学喷出物主要沿双星轨道面分布,在经度上扫过180°,而在纬度上以轨道面为中心跨过10°-20°。粗略地估计,动力学喷出物的质量为吸积盘的一半左右。与双NS并合不同,BH-NS并合的动力...