?The center, ___ nucleus, of an atom contains positively charged particles called protons.? A.and B.or C.but D.for? 正确答案:B解析:??B、这句话中的center和nucleus两词根据意思表达同位关系,使用or完成,译为“即” 5 单选(1分) 读者学会这些基本概念很重要,否则后面内容的讨论理解起来会有...
describe the structure of an atom. an atom consists of a nucleus, which contains protons and neutrons, surrounded by electrons. protons have a positive charge, neutrons have no charge, and electrons have a negative charge. the number of protons determines the element of the atom, while the ...
The present discovery deal about an atom with orbital nucleus, merely orbits only constitute atoms and an orbit with revolving particlein it only constitute an atom without any nucleus. Due to rotation of an atom nucleus feel centrifugal force as well as centripetal forcehence nucleus become ...
Atomic Structure Section The Nucleus Nucleus- contains most of the mass of an atom – Protons & Neutrons contains most of an atom’s mass – Electrons- Unstable Nuclei and Radioactive Decay Objectives: 9.0 Distinguish between chemical and nuclear reactions. 9.3 Identifying types of radiation and ...
aAccording to this model, all positive charge of a given atom, with approximately 99% of its mass, would be concentrated in the atomic nucleus. 根据这个模型,一个特定原子的所有正电荷,与大约99%它的大量,在原子核将被集中。[translate]
Neutrons are neutrally charged subatomic particles found in the nucleus of an atom along with the positively charged protons. Together, protons and neutrons contribute equally to the mass number of the atom. Answer and Explanation:1 Become a Study.com member to unlock this answer!Create you...
Parts of the atom Nucleus Consists of protons and neutrons Extremely dense If the nucleus of an atom was the size of a 1cm ball, it would weight 133,000,000 tons! Electron cloud Area outside the nucleus where the electrons orbit the nucleus Empty space If the nucleus was the size of go...
To explain this anomaly, we assume that in atoms of elements consisting of several isotopes, the binding of positive and negative protons is not simple, but shows various features. It is usual to introduce an hypothesis for explaining the compactness of the nuclei, that the law of electric ...
12.1 Rutherford Model After learning of the nucleus, Rutherford proposed the nuclear atom in which electrons surround a dense nucleus After learning of the nucleus, Rutherford proposed the nuclear atom in which electrons surround a dense nucleus most of the atom being empty space. most of the atom...
The mass of an atom comes from the mass of its protons and neutrons. These are the two largest of the three subatomic particles in an atom and both are found in the nucleus. The smallest subatomic particles, the electrons, orbit the nucleus but have so little mass that they do not ...