Work Function

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Sonia Perez 1G
Posts: 29
Joined: Fri Sep 25, 2015 3:00 am

Work Function

Postby Sonia Perez 1G » Sun Oct 11, 2015 8:47 pm

The work function for chromium metal is 4.37 eV. What wavelength of radiation must be used to eject electrons with a velocity of 1.50 x 10^3km/s?
I'm having trouble figuring out what to do with the "4.37 eV," thank you.

Sean Ezenwugo 3J
Posts: 25
Joined: Fri Sep 25, 2015 3:00 am

Re: Work Function

Postby Sean Ezenwugo 3J » Sun Oct 11, 2015 9:14 pm

You can use the function below to convert eV into Joules:

1 eV = 1.602 x 10^-19 J

You can find it on the back of the laminated periodic table, or on pg 8 on the Fall 2015 Workbook.

Hope this helps!

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