It was these experiments that first showed the atom to consist of a small, massive nucleus(重实的原子核), surrounded by electrons.
正是这些实验首次表明,原子是由一个小而重实的原子核加上在其周围的电子所构成。
举一反三
- The nucleus(原子核) has a diameter(直径) only 0.01% of that of the atom itself.
- Which of the following is not a valid conclusion from Rutherford’s alpha particle scattering experiment? ( ) A: The nucleus must be positively charged B: The nucleus must be very small compared to the atom C: The atom is mainly empty space D: The mass of the atom is mostly concentrated in the nucleus
- When there are two electrons in the N-layer of a ground state atom, The M-layer must have A: 8 electrons B: 10 electrons C: 18 electrons D: 8-18 electrons
- The element immediately following hydrogen is helium, the atom ____ which contains two electrons.
- Around the nucleus of a hydrogen atom moves a single electron._
内容
- 0
Most of the atomic mass(质量) is concentrated in the nucleus, which explains why the nucleus is almost stationary within the atom, while the much lighter electron revolves round it.
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古希腊时期，atom的意思是指 A: 现代物理学中的原子 B: 不可分的东西 C: 分子 D: 原子核
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原子是由原子核和核外______组成；原子核是由______和______组成．
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Rutherford proposed ( ) by analyzing the results of the α particle scattering experiment A: Atomic nuclear structure model B: There are neutrons in the nucleus C: Electrons are part of atoms D: The nucleus is made up of protons and neutrons
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钱三强发现了（）现象。 A: 原子核分裂现象 B: 重原子核三分裂现象 C: 重原子核四分裂现象 D: 原子核聚合现象