ELECTROMAGNETIC RADIATION AND ATOMIC SPECTRA Flashcards
1
Q
Calculation to determine wavelength and frequency
A
C=fλ
2
Q
What is wavelength measured in
A
nm
3
Q
What does a photon do
A
A photon carries quantised energy proportional to the frequency of radiation.
4
Q
Explain how lines are produced on an emission spectra
A
An atom emits a photon of light energy when an excited electron moves from a higher energy level to a lower energy level.
5
Q
How to identify elements from their emission spectra
A
each element has their own emission spectra
6
Q
What excites electrons
A
spark or flame
7
Q
how are emission spectrum samples produced
A
measuring the intensity of light emitted
at different wavelengths.
8
Q
How to measure concentration with emission spectrum
A
higher conc = more intense light
