Flame Emission Spectroscopy (AQA GCSE Chemistry): Flashcards
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12 cards from this deck
Purpose of flame emission spectroscopy
Purpose of flame emission spectroscopy
To analyse elements and ions in a sample
Visual output from flame emission spectroscopy
Visual output from flame emission spectroscopy
Line spectrum
Device that detects wavelengths in flame emission
Device that detects wavelengths in flame emission
Spectrometer
What happens to electrons when sample is heated in flame
What happens to electrons when sample is heated in flame
They become excited and jump to higher energy levels
What electrons do after excitation in flame
What electrons do after excitation in flame
Return to lower energy levels, releasing radiation
What range does emitted radiation often fall in
What range does emitted radiation often fall in
Visible spectrum
Characteristic of a line spectrum
Characteristic of a line spectrum
Narrow lines at specific wavelengths
Why line spectrum is unique to each element
Why line spectrum is unique to each element
Pattern depends on specific ions/atoms, like a fingerprint
What determines position of lines in spectrum
What determines position of lines in spectrum
Charge and electron configuration of ions/atoms
Astrophysics use of flame emission spectroscopy
Astrophysics use of flame emission spectroscopy
Studying composition of stars and celestial bodies
How to determine ion concentration using line spectrum
How to determine ion concentration using line spectrum
Intensity of emission lines proportional to ion number
What causes sample to emit light in this technique
What causes sample to emit light in this technique
Heat from flame excites electrons in atoms/ions