Flame Emission Spectroscopy (OCR GCSE Chemistry A (Gateway Science Suite)): Flashcards
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Purpose of flame emission spectroscopy
Purpose of flame emission spectroscopy
Analyse elements and ions in a sample
Visual output of flame emission spectroscopy
Visual output of flame emission spectroscopy
Line spectrum
Effect of flame heat on electrons
Effect of flame heat on electrons
Become excited, jump to higher energy levels
What excited electrons do next
What excited electrons do next
Return to lower energy levels
What's released when electrons drop to lower levels
What's released when electrons drop to lower levels
Radiation (energy)
Components of a line spectrum
Components of a line spectrum
Narrow lines at specific wavelengths
Why line spectrum called a 'fingerprint'
Why line spectrum called a 'fingerprint'
Unique to specific ions/atoms in sample
What determines line position in spectrum
What determines line position in spectrum
Charge and electron configuration of ions/atoms
Do H and Na have same line spectra?
Do H and Na have same line spectra?
No, each has lines at different wavelengths
Flame spectroscopy use in astrophysics
Flame spectroscopy use in astrophysics
Study composition of stars and celestial bodies
Can flame spectroscopy measure concentration?
Can flame spectroscopy measure concentration?
Yes, by analysing emission line intensity
How intensity relates to concentration
How intensity relates to concentration
Intensity proportional to number of atoms/ions