Question

I: Gas-phase elements absorb or emit only specific wavelengths of visible light when excited by an electric current.
II: The energy levels that electrons can occupy in gas-phase atoms and molecules are continuous.

Answer 1

Gas phase elements absorb or emit only specific wavelength as the energy is quantized i.e. each energy level has a fixed energy and wavelength are released corresponding to them,

$E=-13.6\times \frac{z^2}{n^2}$

$\to$Energy levels that electrons can occupy in gas phase atom and molecules are not continuous but discrete. Therefore, statement $II$ is false.