Around the nucleus of a hydrogen atom moves a single electron._
举一反三
- In hydrogen atom the angular momentum of the electron in the lowest energy state ( )
- 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.
- 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
- （ ）is a simple compound of two atoms of hydrogen and one atom of oxygen.
- Water is a simple compound of two atoms of hydrogen and one atom of oxygen