The binding energy of electrons in a metal is 192 kj/mol . part a find the threshold frequency of the metal.

To calculate the threshold frequency of the metal we use the formula,

Also,

Here, E is the energy of electron per atom, h is plank constant.

Given, binding energy of electron   or for one electron,, here N is the Avogadro constant and its value is , so and plank constant,  

Substituting these values in above relation we get,

.

Thus, the threshold frequency of the metal is .

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