The energy scale of atom is ( ).
举一反三
- The density scale of atom is ( )
- In hydrogen atom the angular momentum of the electron in the lowest energy state ( )
- A laser can be best described by______. A: a device for stimulating atoms and molecules to emit light B: an atom in a high energy state C: a technique for destroying atom or molecules D: an instrument for measuring light waves
- Before fossil fuels were exploited and applied on a large scale, ( ) the main source of energy in ancient China.
- For a hydrogen-like atom, the energy [img=119x51]1803bd5d31efe8a.png[/img]. The electronic energy of [img=32x21]1803bd5d3a864a7.png[/img]in the [img=18x18]1803bd5d426aa1b.png[/img] state is A: one-ninth that of H in the 1s state. B: nine times that of H in the 1s state. C: four-ninths that of H in the 1s state. D: nine-fourths that of H in the 1s state.