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一、单项选择题(每小题的四个选项中,只有一项是正确的。每小题2分,共36分。) 1.下列哪一历史事实,使人们认识到原于不是组成物质的最小微粒,原子本身也有结构:( ) A.汤姆生发现电子. B.卢瑟福的α粒子散射实验. C.玻尔成功解释氢光谱. D.贝克勒耳发现天然放射现象. 2.放射性元素所放出的三种射线中:( ) A.α射线是光子流,β射线是电子流,γ射线是氦
First, single-choice questions (only one of the four options for each question is correct. 2 points for each question, for a total of 36 points.) 1. Which of the following historical facts makes people realize that the original is not a constituent material? The smallest particle, the atom itself has a structure: () A. Thomson discovered the electron. B. Rutherford’s alpha particle scattering experiment. C. Bohr successfully explained the hydrogen spectrum. D. Becker discovered the natural radiation phenomenon. Among the three types of radiation emitted by radioactive elements: () A. α-rays are photon fluxes, β-rays are electrons, and γ-rays are