Question

Work function for a metal will change if ,,

Answer 1

if it becomes a non metal. ..

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Answer 2

Work function for a metal will change if

Explanation:

• The work function is the difference between the energy of the most excited electrons in the conduction band and the vacuum.
• It's the energy required to take an electron from the conduction band and remove it to outside the metal.
• The work function is not a characteristic of a bulk material, but rather a property of the surface of the material (depending on crystal face and contamination).
• The work function is the minimum amount of energy (per photon) needed to eject an electron from the surface of a metal.

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