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12 Cards in this Set
- Front
- Back
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What is the equation for the relationship between frequency and wavelength for electromagnetic radiation? |
C = fλ Where: C = speed of light F = frequency λ = wavelength |
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What does dual nature referr to? |
Electromagnetic radiation can behave both as a particle and wave |
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How does electromagnetic radiation behave when absorbed/emitted by matter? |
As a stream of particles called photons |
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What is equation for the energy associated with one photon? |
E = hf Where: E = energy h = planks constant f = frequency |
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What is the equation for energy associated with one mole of photons? |
E = Lhf Where: E = energy L = Avogadros Constant h = plancks Constant f = frequency |
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What can happen to electrons when energy is transformed to atoms? |
Electrons can be promoted to higher energy levels |
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What happens when an excited electron falls from a higher energy level to a lower one? |
It emits a photon |
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What are the two types of spectra |
Absorption and Emission |
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What is the difference between absorption and emission spectroscopy? |
AS has the sample is done by having electromagnetic radiation directed at a sample, promoting electrons to higher energy levels ES has the sample normally turned into a gas and then the electrons excited by a hot temperature |
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What us the difference between an absorption spectrum and an emission spectrum? |
AS looks at how the intensity of absorbed light varies with wavelength ES measures the intensity of light emitted at different wavelengths |
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What are absorption and emission spectra used for? |
They're used to identify and quantify elements |
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How can you tell the concentration of an element using atomic spectroscopy? |
The intensity of light emitted or absorbed |
