How to Identify a Metal Using Work Function and Wavelength?

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To calculate the work function of a metal using the photoelectric effect, the key equation to use is E = hf - φ, where E is the energy of the emitted electrons, hf is the energy of the incoming photons, and φ is the work function of the metal. Given a wavelength of 200.0 nm, the energy of the photons can be calculated using the formula E = hc/λ, where h is Planck's constant and c is the speed of light. Once the energy of the photons is determined, the stopping potential (3.33 V) can be converted to energy using E = eV, where e is the charge of an electron. The work function can then be found by rearranging the initial equation to φ = hf - eV. This process allows for the identification of the metal based on its work function, which is a characteristic property of each metal.
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Calculating Work Function

I am having trouble identifying a metal (based on its work function) given the wavelength and stopping potential. I will give more specifics below but can anyone help me with useful formulas to make this a little more streamlined in the future? Thanks!

Ultraviolet radiation with wavelength 200.0 nm hits a metal and electrons are emitted, which can be stopped by a potential of 3.33 V. What is the work function/identity of the metal?
 
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Start with the equation describing photoelectric effect. You will need to convert between different ways of expressing energy, other than that it is just a simple plug and chug.
 
Thanks I will give it a shot!
 

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