AES Flashcards
How do colours arise?
Through electromagnetic radiation and matter (absorption, reflection, and transmittance)
Electromagnetic radiation
light, the oscillating electric and magnetic fields
Transmittance
a measurement of how much light passes through a sample
Electrons closest to the nucleus
have lower energies than those farther away
how do you excite an electron?
shine a light that has the energy equal to the difference between an occupied and unoccupied state
Electron is excited
Energy increases
Electron relaxes
Energy decreases
Qualitative analysis
analysis that does not provide the concentration of species in the sample
Quantitative analysis
analysis that gives the concentration of the species
What gasses were studied?
Helium, Hydrogen, and Neon
What is emitted?
SPECIFIC wavelengths of light dependent on the values of the energy
n is a measure of
the distance of electrons from the nucleus
spectrum of H
410 - violet
440 - purple
490 - blue
650 - red
spectrum of He
485 - dark blue
500 - blue
510 - turquoise
595 - burnt orange
680 - red
Spectrum of the sun
entire spectrum (full rainbow) will be visible