what is one of the major conclusions made from the study of line spectra of various elements?\na the…

what is one of the major conclusions made from the study of line spectra of various elements?\na the movement of electrons outside the nucleus\nb absorption and emission of energy is quantized\nc the presence of energy beyond the visible spectrum\nd the presence of electrons outside the nucleus of an atom

what is one of the major conclusions made from the study of line spectra of various elements?\na the movement of electrons outside the nucleus\nb absorption and emission of energy is quantized\nc the presence of energy beyond the visible spectrum\nd the presence of electrons outside the nucleus of an atom

Answer

Brief Explanations:

  • Option A: The movement of electrons outside the nucleus is a general concept but not the major conclusion from line - spectra studies.
  • Option B: Line spectra show that atoms emit or absorb energy only in discrete amounts (quanta). For example, when an electron transitions from one energy level to another, it emits or absorbs a photon with a specific energy corresponding to the difference in energy levels. This implies that absorption and emission of energy is quantized.
  • Option C: The presence of energy beyond the visible spectrum is not the key conclusion from the study of line spectra of various elements. Line spectra are mainly about the discrete nature of energy absorption/emission.
  • Option D: The presence of electrons outside the nucleus was already known before the detailed study of line spectra in the context of atomic structure.

Answer:

B. absorption and emission of energy is quantized