Fichas
Atomic Spectroscopy
Fichas del conjunto (7)
- 1electron configuration irregularschromium (Z = 24)
1s2 2s2 2p6 3s2 3p6 4s1 3d5
copper (Z = 29)
1s2 2s2 2p6 3s2 2p6 4s1 3d10 - 2energy levels- energy levels of electrons in subshells of atom
- electrons have a specific amount of energy when occupying a subshell
- electrons transition between energy levels through absorption/emission of energy - 3atomic absorptiontransition to higher energy level (e.g., 3s to 3p) will only occur if the quantity of energy absorbed by an electron is equal to difference in energy between 2 energy levels
- 4electromagnetic radiation- energy of a photon is dependent on its wavelength
- electrons absorb/emit photons w a specific wavelength when they transition between energy levels
- electrons in the same subshells of different atoms require a different wavelength of electromagnetic radiation to be absorbed/emitted
- this makes each wavelength unique to each element - 5atomic absorption spectroscopy- light source emits specific wavelengths of electromagnetic radiation that are absorbed by electrons of element under analysis
- amount of radiation absorbed is proportional to the conc. of element in sample - 6atomic absorption spectrometermonochromator = isolates a specific wavelength of radiation from light source for transmission to detector
- monochromator only allows radiation that hasn't been absorbed by electrons to reach detector - 7specificity of AAS- light source typically contains atoms of the element of interest
- atoms in the lamp emit wavelengths of electromagnetic radiation when light source is energised
- other elements in sample don't affect measurement since the radiation doesn't transition their electrons to higher energy levels (since wavelengths are specific to each element)
- the wavelengths are absorbed by electrons of atoms of element under analysis
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- South Australian Certificate of Education Chemistry Fichas sobre Atomic Spectroscopy, creado por Michala Baldwin el 30/10/2022.
- Creado por
- Michala Baldwin
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