Electromagnetic Spectrum Flashcards
Unit 1
why is electromagnetic radiation said to have a dual nature?
it can be described as both a wave and as a particle.
what is the formula used to show the relationship between wavelength and frequency?
c = f x λ
what happens to the electrons when a photon is absorbed or emitted?
energy is lost or gained by electrons
does photons with high frequencies transfer a larger or small amounts of energy?
large amounts
what happens in order for lines to appear on the emission spectra
the energy given out when excited electrons move down to a lower energy level, generating photons of various frequencies
what do the lines correspond to?
specific frequencies and wavelengths found in the visible or ultraviolet spectrum
how is a photon of light absorbed by an atom?
when the energy of the photon corresponds to an excitation energy of the atom
what can both emission and absorption spectroscopy be used for?
to determine whether a certain species is present in a sample and how much of it is present
what causes a line on an emission spectra?
Movement of electrons from higher to lower energy levels.
Suggest why an Fe3+ ion is more stable than an Fe2+ ion:
Stability of having all d-orbitals half filled.
what is the electromagnetic spectra?
different types of radiation arranged in order of wavelength
what increases as a result of an increase in the concentration of an ion in solution?
intensity of the radiation transmitted.
