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【答案】应助回帖
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wchm7125: 金币+20, 翻译EPI+1, ★★★★★最佳答案, 像你学习 2012-04-21 22:41:17
The direction of motion of the particles are deflected, the individual particles are reflected back, the particles bounce off the fact that the positively charged particles of the particles with great quality with a strong collision. Thus, Ruherford nuclear structure model of the atom: atoms positive charge is concentrated in a small area (atomic diameter is about 10-19m, the diameter of the core is about 10-15 ~ 10-14m), atomic mass main from the positively charged part of the nucleus. Atoms in the quality of small electronic around the nucleus rotates, running like a planet around the sun.
How to interpret the experimental facts and the empirical formula of the stability of atoms and the hydrogen atom spectrum, classical physics is powerless. In accordance with the classical electromagnetic theory, the atom is unstable. Around the high-speed rotation of the nuclear electronic automatic and continuous radiation energy spectrum of the emission should be a continuous spectrum without line spectra.
He found that the occurrence of periodic alternation of the nature of the elements with relative atomic mass increments. Knowledge of atomic structure was the relative lack of, not a deep understanding of the nature of the arrangement with the elements of atomic extranuclear cycle and the division of the family contact, and various forms of the periodic table.
Based on the point of view of quantum mechanics, electrons in the outer nuclear movement is not a fixed orbit, only the probability distribution of different atoms there is no clear interface does not exist the radius in the classic sense. People assume that the atom was a sphere, with the spacing of adjacent atomic nuclear atomic radius. Based on the different forms of this assumption as well as atomic, atomic radius can be divided into metal radius, covalent radius and the van der Waals radius. |
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