Question

1.) Which transition in a hydrogen atom would
**emit** the photon of greatest frequency?

n = 35 to n = 2

n= 6 to n = 2

n = 12 to n = 6

n = 1 to n = 4

n = 2 to n = 9

n = 3 to n = 1

***NOT n=35 to n=2***

2.) Which transition in a hydrogen atom would
**absorb** the photon of greatest frequency?

n = 3 to n = 1

n = 6 to n = 2

n = 2 to n = 9

n = 35 to n = 2

n = 12 to n = 6

n = 1 to n = 4

***NOT n=2 to n=9***

3.) One is a "cation" with a 1+ charge, and the other is an "anion" with a 1- charge. The dashed line in the center represents the path of an uncharged particle.

What is the approximate ratio of the mass of B to the mass of A (the B/A ratio)? Express your answer as number (like 3.8 or 0.79), not as a fraction (like 7/6 or 7:6). (Hint : Can you tell which particle is heavier?)

4.)What are the frequency and energy of a photon with a wavelength of 527 nm?

frequency=

energy=

5.) Which of the following points could be concluded or
determined from Thomson's cathode ray experiment?

Check all the boxes that apply. (There may be anywhere from zero to
five correct statements.) This question is graded "all or nothing",
no partial credit.

-cathode rays were negatively charged

-cathode rays were particles, not light waves

-the numerical mass of the cathode rays

-the numerical charge of the cathode rays

-the charge to mass ratio of the cathode rays

6.) Rank the following charge/distance combinations *from
lowest energy to highest energy*. Your answer should be a four
letter "word" made up of the letters a, b, c and d. For example, if
you think the order is a (lowest energy), then b, then c, then d
(highest energy), you should enter the "word" abcd in the answer
box. Note, the word has no spaces or commas.

a) A +2 charge and a -2 charge separated by 3 units of
distance

b) A -3 charge and a -1 charge separated by 3 units of
distance

c) A +1 charge and a +1 charge separated by 2 units of
distance

d) A -1 charge and a +2 charge separated by 3 units of distance

****NOT cdba****

7.) Determine the energy of an electron in the given quantum
level of each of the following ions. (*Hint:* Each of the
ions has a different number of protons, but each has only one
electron, so the Bohr model applies.)

(a) Li^{2+} with n = 2

(b) O^{7+} with n = 6

Answer #1

1) In case of emission the quantum number of final orbit will be
lesser than that of inital orbit (n_{i} >
n_{f})

**The correct option is n=3 to n=1**

E = hv

v = E/h =
R_{H}/h (1/n_{i2} -
1/n_{f}^{2})

v comes out to highest in case of n_{i} = 3 anf
n_{f} = 1

2) The energy of photon is directly proportional to energy (E = hv)

For absorption to take place , quantum number of initial orbit
should be less than final (n_{f} > n_{i})

**Therefore the correct option is n =1 to n
=4**

v = E/h =
R_{H}/h (1/n_{i2} -
1/n_{f}^{2})

v comes out to highest in case of n_{i} =1 anf
n_{f} = 4

1.) Which transition in a hydrogen atom would
emit the photon of greatest frequency?
n = 35 to n = 2
n= 6 to n = 2
n = 12 to n = 6
n = 1 to n = 4
n = 2 to n = 9
n = 3 to n = 1
***NOT n=35 to n=2***
2.) Which transition in a hydrogen atom would
absorb the photon of greatest frequency?
n = 3 to n = 1...

*******PLEASE EXPLAIN HOW YOU GOT THE ANSWER.********
1.) Rank the following charge/distance combinations from lowest
energy to highest energy. Your answer should be a four letter
"word" made up of the letters a, b, c and d. For example, if you
think the order is a (lowest energy), then b, then c, then d
(highest energy), you should enter the "word" abcd in the answer
box. Note, the word has no spaces or commas.
a) A -3 charge and a...

2.) Which transition in a hydrogen atom would absorb the photon
of greatest frequency?
n = 3 to n = 1
n = 6 to n = 2
n = 2 to n = 9
n = 35 to n = 2
n = 12 to n = 6
n = 1 to n = 4
***NOT n=2 to n=9***

An electron in a hydrogen atom undergoes a transition from the n
= 6 level to some lower energy level. In doing so, energy is
released in the form of light. a) Calculate the frequency in s-1
(to 3 significant figures) of a photon of light associated with the
highest frequency transition (i.e. largest difference in frequency)
possible from the n = 6 to a lower level. (HINT: Try drawing a
picture first…) b) Calculate the wavelength (in nm) of...

Consider the electronic transition from n = 4 to n = 1 in a
hydrogen atom, and select the correct statement below: A photon of
97 nm wavelength and 2.05x10-18 J energy was emitted from the
hydrogen atom in this electronic transition. A photon of 97 nm
wavelength and 2.05x10-18 J energy was absorbed by the hydrogen
atom in this electronic transition. A photon of 122 nm wavelength
and 1.64x10-18 J energy was emitted from the hydrogen atom in this...

1. a. A photon is absorbed by a hydrogen atom causing an
electron to become excited (nf = 6) from the ground state electron
configuration. What is the energy change of the electron associated
with this transition?
b. After some time in the excited state, the electron falls from
the n = 6 state back to its ground state. What is the change in
energy of the electron associated with this transition?
c. When the electron returns from its excited...

Of the following transitions in the Bohr hydrogen atom, the _
transition results in the emission of lowest-energy photon:
(A) n = 2 --> n = 1
(B) n = 6 --> n = 1
(C) n = 6 --> n = 5
(D) n = 5 --> n = 6
(E) n = 1 --> n = 6

An electron in a hydrogen atom makes a transition from the n = 7
to the n = 2 energy state. Determine the wavelength of the emitted
photon (in nm). Enter an integer.

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?

Which is greater: The energy of a
photon emitted from a hydrogen atom when the electron makes a
transition from the n = 3 to the n = 1 energy
level, or
• the kinetic energy of a 2 gram Ping-Pong ball moving with a
speed of 1 m per hour?

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