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
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
A
举一反三
- Which of the following is not a valid conclusion from Rutherford’s alpha particle scattering experiment? ( )
- 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.
- Around the nucleus of a hydrogen atom moves a single electron._
- 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
- 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.
内容
- 0
The nucleus(原子核) has a diameter(直径) only 0.01% of that of the atom itself.
- 1
In 1932, physicists engaged in studying the atom and its nucleus had only three particles to consider: the proton, the neutron ,and the electron.
- 2
Nuclear power plants use the forces within the nucleus of an atom to generate electricity. ()generate A: produce B: liquidate C: change D: retard
- 3
A syllable must have a nucleus and a ______ .
- 4
All syllables must have a nucleus and a coda.