Calculate the percent ionization of formic acid in a solution that is 0.152 M in formic acid. The Ka of formic acid is 1.77 × 10 -4.​

Idon't know hope someone you

Idon't mean to be a smart alec, length of atoms' bonds is the simplest way to define it.

The answer to your q it is false

When the electrons fall back down and leave the excited state, energy is re-emitted in the form of a photon. the wavelength (or equivalently, frequency) of the photon is determined by the difference in energy between the two states. these emitted photons form the element's spectrum.