Question

The best evidence that electrons are arranged in definite orbits or energy levels is based on the observation that:

• A. atomic spectra consist of discrete lines and not continuous bands
• B. electrons in the beta ray have high kinetic energy
• C. the penetrating power of cathode ray electrons depends upon the voltage used to produce them
• D. electrons revolve around the nucleus

Answer 1

The correct option is A atomic spectra consist of discrete lines and not continuous bands

The best evidence that electrons are arranged in definite orbits or energy levels is based on the observation that the spectral lines of hydrogen atom consist of discrete lines and not continuous bands.