Answered: energy). Suppose that a PES experiment…

energy). Suppose that a PES experiment is performed in which mercury vapor is irradiated with ultraviolet light of wavelength 58.4 nm. (Figure 1)

Chemistry: The Molecular Science

5th Edition

ISBN:9781285199047

Author:John W. Moore, Conrad L. Stanitski

Publisher:John W. Moore, Conrad L. Stanitski

Chapter5: Electron Configurations And The Periodic Table

Section: Chapter Questions

Problem 134QRT

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Concept explainers

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

One way to measure ionization energies is photoelectron
spectroscopy (PES), a technique based on the
photoelectric effect. In PES, monochromatic light is
directed onto a sample, causing electrons to be emitted.
The kinetic energy of the emitted electrons is measured.
The difference between the energy of the photons and the
kinetic energy of the electrons corresponds to the energy
needed to remove the electrons (that is, the ionization
energy). Suppose that a PES experiment is performed in
which mercury vapor is irradiated with ultraviolet light of
wavelength 58.4 nm. (Figure 1)
Figure
lonization energy (kJ/mol)
2500
2000
1500
1000
500
0
419
Rb
403
496
1A 2A
549
Ha
509
H
1312
$20 M
Na 738
Be
899
Ca
990
801
Al 786
Sa
709
558 PD
11 710
Ga 762
Ge 947 941
579
S 1012 1000
BE
703
Sb
834
O
1402 1314
Po
812
Increasing ionization energy
s 1251
Te 1008
SAY
1681
Kr
Se 1140
Be 1351
Xo
1170
Rn
1037
3A 4A SA 6A 7A SA
<
Ar
1521
Ne
2081
1 of 1 >
He
Increasing ionization energy

What is the energy of a photon of this light, in eV?
VE ΑΣΦ
ΕΞ
H
?
eV

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