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.
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._