An atom is made up of ___. A. protons, neutrons and electrons B. protons and neutrons only C. neutrons and electrons only D. protons and E. lectrons only 相关知识点: 试题来源: 解析 A。原子由质子、中子和电子组成。选项 B、C、D 都不完整。反馈...
英文词汇:molecules,nucleus,protons,neutrons,electrons一定要加S么,为什么.还是一般情况?atom呢? 答案 就是单数复数啦...比如说proton就是一个质子,protons就是多个质子……氢就是one proton……在这几个词中,nucleus比较特殊.nucleus是单数,nuclei是复数【参见半径单数=radius复数=radii】相关推荐 1英文词汇:molecule...
either gain or lose electrons are calledions. If a neutral atom loses an electron, it becomes a positive ion. If it gains an electron, it becomes a negative ion. These basic subatomic particles—protons, neutrons, and electrons—are themselves made up of smaller substances, such asquarksand...
【1.2】原子组成:Protons(质子)、Neutrons(中子)、Electrons(电子) 原子核(nucleus)由质子+中子组成。 【1.3】原子的大小 【2】历史上有原子的证据吗? 翻译:原子是最小的不可分的思想,最早提出于公元前400年。但是实验能够证实,直到17、18世纪。事实上目前对原子的认识,经过数百年的发展。每一次新的实验证据被采...
The protons are positively charged particles (+) and neutrons carry no charge. The electron is a negatively charged particle (-) with 1/840 the mass of a proton. Isotopes related practice Isotopes are the atoms of the same element that differ in the number of neutrons they contain. Because...
【题目】翻译一下可以吗1.An atom is made up of positive charges (protons),neutral charges (neutrons)and negative charges (electrons).T he protons and neutrons are found within the nucleus ofan atom,while we learnt in P08 Curious glowthat the electrons are found in different energy levels ...
A simplified look into the structure of an atomExplore an atom's interior to discover the layout of its nucleus, protons, and electrons.(more)See all videos for this article Most of the atom is empty space. The rest consists of three basic types of subatomic particles: protons, neutrons, ...
The atom, derived from a Greek word that translates loosely into "that which cannot be divided," is widely considered to the the fundamental unit of all matter. Atoms consist of subatomic particles called protons, neutrons and electrons, with the former two residing in the nucleus of the atom...
Each element is defined by the number of protons found in each of its atoms. No matter how many electrons or neutrons an atom has, the element is defined by its number of protons. In fact, it's actually possible to have an atom consisting of only a proton (ionized hydrogen). The peri...
and neutrons (hydrogen has 0). An element can has different kinds of atom. In fact they have same no.s of electrons and protons but different no.s of neutron to form a new chemical characteristic. It's called isotope of a element. A mass of an atom is measured by the no...