Question

Consider the first three energy levels of hydrogen (n = 1, 2, 3).

a) What photon energies can be observed from transitions between
these levels? Label these in increasing order as E_{1},
E_{2}, and E_{3}.

b) A hydrogen atom which is initially in the n = 2 level collides with an aluminum atom in its ground state (the kinetic energy of the collision is nearly zero). The hydrogen can drop to the n = 1 level and ionize the aluminum atom. If the ionization energy of aluminum is 6 eV, what energy will the emitted electron have (in eV)?

c) Suppose you have mystery atom, and collide it with hydrogen atoms prepared in the n = 2 level, observing electrons with energy 6.3 eV. What is the ionization energy of the mystery atom?

Answer #1

b. E_{photon emitted from H atom,n=2 to n=1)}=
E_{2}-E_{1} = 10.2 eV . Now this photon will ionize
the aluminum atom.

Using the relation,

K.E = E_{photon} - Ionization energy

K.E. = 10.2 eV - 6 eV = 4.2eV

c.

According to what you have asked,the mystery atom is getting ionized. So The H atom in n=2 will fall to n=1 after ionizing the mystery atom. Here,again

E_{photon emitted from H atom,n=2 to n=1)}=
E_{2}-E_{1} = 10.2 eV

Using the relation,

K.E = E_{photon} - Ionization energy

6.3 eV = 10.2 eV - Ionization energy

Hence, Ionization Energy= 10.2eV -6.3 eV = 3.9 eV

Consider the following energy levels of a hypothetical
atom:
E4 −1.51 ×
10−19 J
E3 −5.11 ×
10−19 J
E2 −1.15 ×
10−18 J
E1 −1.85 ×
10−18 J
(a) What is the wavelength of the photon needed to
excite an electron from E1
to E4? (in
m)
(b) What is the energy (in joules) a photon must have in
order to excite an electron from E2
to E3?
(c) When an electron drops from the
E3 level to the...

The first four energy levels for an atom are:
E1 = -8.57 eV E2 = -2.14
eV E3 = -0.95 eV E4 = -0.54
eV
An electron with a kinetic energy of 7.74 eV collides with an
electron in its ground state. After the collision, the atom is in
an excited state and the electron is scattered. The kinetic energy
of the scattered electron could be
I have been struggling with this question, help asap would be
highly appreciated. Thank...

We can observe the differences in energy levels by observing the
light that is emitted when atoms are heated. When atoms are heated,
the electrons can jump up to a higher energy level. When one
electron falls back down to a lower energy level, a single photon
of light is emitted with an energy equal to the difference in
energy of the two levels. We call this atomic emission
spectroscopy. If an electron in an atom jumps from the n...

A hydrogen atom transitions from the n = 6 excited state to the
n = 3 excited state, emitting a photon.
a) What is the energy, in electron volts, of the electron in the
n = 6 state? How far from the nucleus is the electron?
b) What is the energy, in electron volts, of the photon emitted
by the hydrogen atom? What is the wavelength of this photon?
c) How many different possible photons could the n = 6...

1) An electron in the hydrogen atom drops from the n=5 level to
the n=1 level. What are the frequency, wavelength, and energy of
the emitted photon? In which series does this photon occur? How
much energy must be absorbed by the atom in order to kick the
electron back up to the fifth level?
2) Calculate the maximum wavelength for the initiation of a
photoelectric current in the aluminum (work function W = 4.28
eV).

A photon of which electromagnetic radiation has the most energy?
(ultraviolet, infrared, x ray, or microwave)
What is the minimum energy needed to ionize a hydrogen atom in
the n=2 energy state? (13.6 eV, 10.2 eV, 3.40 eV, or 1.89 eV)
An electron in a mercury atom drops from energy level f to
energy level c by emitting a photon having an energy of.... (8.20
eV, 5.52 eV, 2.84 eV, or 2.68 eV)
A mercury atom in the ground state...

1. The energy of the electron in the lowest level of the
hydrogen atom (n=1) is -2.179×10-18 J. What is the energy of the
electron in level n=5? -8.716×10-20 J 2.The electron in a hydrogen
atom moves from level n=6 to level n=4.
a) Is a photon emitted or absorbed?
b) What is the wavelength of the photon?

a. what is the energy of the emitted photon if an electron in
the hydrogen atom makes a transition from the n=7 state to the n=2
state?
b. Now, Imagine there is a photon with the same wavelength. What
is the speed of this photon?

1. What is the energy in eV and wavelength in µm of a photon
that, when absorbed by a hydrogen atom, could cause a transition
from the n= 4 to the n= 8
energy level?
a) energy in eV
b) wavelength in µm
2. The so-called Lyman-αphoton is the lowest energy photon in
the Lyman series of hydrogen and results from an electron
transitioning from the n= 2 to the n= 1 energy level. Determine the
energy in eV and...

What is the energy of the photon that, when absorbed by a
hydrogen atom, could cause the following?
(a) an electronic transition from the n = 2 state to
the n = 5 state
eV
(b) an electronic transition from the n = 5 state to the
n = 7 state
eV

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 47 seconds ago

asked 23 minutes ago

asked 50 minutes ago

asked 50 minutes ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 3 hours ago

asked 3 hours ago