atomic spectroscopy

Question 1

what do the dark lines represent on line absorption spectra

Answer 1

certain wavelengths which have been removed by absorption by the source

Question 2

what do the lines on emission spectra represnt

Answer 2

a distinct wavelenght of emitted light

Question 3

how is light emitted

Answer 3

atoms are excited when they absorb energy and move up to an outer shell
energy in the form of a photon is released when electrons move to a lower energy level
the energy is releated as a particular wavelength of light
differences between energy levels are fixed in any particular atom
each line on emission spectra is formed from a specific energy difference as electrons fall back from their excited state

Question 4

are electrons stable when they are in their excited state

Answer 4

no

Question 5

what is the ground state of an electron

Answer 5

lowest energy state of the atom