The work function of metal is the minimum energy required to produce photoelectric effect on that metal, and the work function for potassium metal is 220. kJ/mol (a) What is the minimum energy in Joules required to eject an electron from potassium metal? (b) What is the longest wavelength of light, in nanometers (nm), capable of producing photoelectric effect on potassium metal? (c) If the surface of a piece of potassium metal is shone with a green light having wavelength, 2. = 510. nm, what is the kinetic energy of the ejected electron? (d) What is the speed (in m/s) of the ejected electron? (Planck's constant, h= 6.626 x 10 34 J•s.; speed of light, c = 3.00 x 10° m/s; m = 9.11 x 10 ³1 kg; i ev = 1.60 x 10-19 J; 1J=1 kgm³/s²)

The work function of metal is the minimum energy required to produce photoelectric effect on that metal, and the work function for potassium metal is 220. kJ/mol (a) What is the minimum energy in Joules required to eject an electron from potassium metal? (b) What is the longest wavelength of light, in nanometers (nm), capable of producing photoelectric effect on potassium metal? (c) If the surface of a piece of potassium metal is shone with a green light having wavelength, 2. = 510. nm, what is the kinetic energy of the ejected electron? (d) What is the speed (in m/s) of the ejected electron? (Planck's constant, h= 6.626 x 10 34 J•s.; speed of light, c = 3.00 x 10° m/s; m = 9.11 x 10 ³1 kg; i ev = 1.60 x 10-19 J; 1J=1 kgm³/s²)

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Quantum Chemistry

Quantum chemistry deals with the properties of chemical systems and their reactions. The branch of chemistry which is more concerned with quantum chemistry is physical chemistry. It is a more sophisticated field of theoretical physics which is concerned towards the application of physical concepts towards various chemical aspects such as, formation of atoms, chemical structure descriptions, chemical bond strength, hybridization, conjugation etc. Quantum chemistry mainly studies the various states i.e., ground state, excited state, transition states of the individual atoms or molecules taking place during any chemical reaction. The laws of motion explained by various scientists, which are termed as “classical mechanics” were not acceptable in terms of electrons, protons, atoms, light etc. Thus, a new theory named “quantum mechanics” emerged to understand the basic framework of various atomic and subatomic particles.

Question

The work function of metal is the minimum energy required to produce photoelectric effect on that
metal, and the work function for potassium metal is 220. kJ/mol
(a) What is the minimum energy in Joules required to eject an electron from potassium metal?
(b) What is the longest wavelength of light, in nanometers (nm), capable of producing photoelectric
effect on potassium metal? (c) If the surface of a piece of potassium metal is shone with a green light
having wavelength, 2. = 510. nm, what is the kinetic energy of the ejected electron? (d) What is the
speed (in m/s) of the ejected electron?
(Planck's constant, h= 6.626 x 10 34 J•s.; speed of light, c = 3.00 x 10° m/s; m = 9.11 x 10 ³1 kg;
i ev = 1.60 x 10-19 J; 1J=1 kgm³/s²)

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