Question

1) The Pauli Exclusion Principle tells us that no two electrons in an atom can have the same four quantum numbers.

Enter ONE possible value for each quantum number of an electron in the orbital given.

Orbital	n	l	ml	ms
1s					There are a total of values possible for ml.
2s					There are a total of values possible for ml.

2) The Pauli Exclusion Principle tells us that no two electrons in an atom can have the same four quantum numbers.

Enter ONE possible value for each quantum number of an electron in the orbital given.

Orbital	n	l	ml	ms
3d					There are a total of values possible for ml.
3p					There are a total of values possible for ml.

3) Calculate the energy for the transition of an electron from the n = 1 level to the n = 2 level of a hydrogen atom.

E = Joules

Is this an Absorption (A) or an Emission (E) process ?

4) Calculate the energy for the transition of an electron from the n = 1 level to the n = 8 level of a hydrogen atom.

E = Joules

Is this an Absorption (A) or an Emission (E) process ?

5) Compare the de Broglie wavelength of an electron moving at 1.30×107 miles per hour (5.81×106 m/s)to that of a bullet moving at 700 miles per hour (313 m/s) and a baseballwith a speed of 90.0 miles per hour (40.2 m/s).

Which region of the electromagnetic spectrum are each of these wavelengths near?

A.	Ultraviolet	10-8 to 10-7 meters
B.	X-ray	10-11 to 10-8 meters
C.	Gamma ray	10-16 to 10-11 meters
D.	Smaller than	10-20 meters. Cannot detect wave-like properties. Only particle-like behavior will be observable.

Particle	Mass (kg)	Velocity (m/s)	Wavelength (m)	Region
electron	9.11×10-31	5.81×106		___ABCD
bullet	1.90×10-3	313		___ABCD
baseball	0.140	40.2		___ABCD

6) Compare the de Broglie wavelength of a baseball moving at 90.0 miles per hour (40.2 m/s)to that of an electron moving at 1.30×107 miles per hour (5.81×106 m/s) and an alpha particle with a speed of 3.40×107 miles per hour (1.52×107 m/s).

Which region of the electromagnetic spectrum are each of these wavelengths near?

A.	Ultraviolet	10-8 to 10-7 meters
B.	X-ray	10-11 to 10-8 meters
C.	Gamma ray	10-16 to 10-11 meters
D.	Smaller than	10-20 meters. Cannot detect wave-like properties. Only particle-like behavior will be observable.

Particle	Mass (kg)	Velocity (m/s)	Wavelength (m)	Region
baseball	0.140	40.2		___ABCD
electron	9.11×10-31	5.81×106		___ABCD
alpha particle	6.64×10-27	1.52×107		___ABCD

7) Radio wave radiation falls in the wavelength region of 10.0 to 1000 meters.

What is the frequency of radio wave radiation that has a wavelength of 167 m?

Frequency = sec-1

8) A local FM radio station broadcasts at a frequency of 89.0 MHz.

Calculate the wavelength at which it is broadcasting.

Wavelength =   meter

(1 MHz = 106 s -1)

Answer 1

1)

a) 1s

n= 1

l = 0 (for s orbital)

ml = 0 (ml can only be 0)

ms = +1/2 (It can be either +1/2 or -1/2)

total values of possible ml = 1

b) 2s

n= 2

l = 0 (for s orbital)

ml = 0 (ml can only be 0)

ms = +1/2 (It can be either +1/2 or -1/2)

total values of possible ml = 1

2)

a) 3d

n= 3

l = 2 (for s orbital)

ml = 0 (ml can be -2, -1, 0, 1, 2)

ms = +1/2 (It can be either +1/2 or -1/2)

total values of possible ml = 5

b) 3p

n= 3

l = 1 (for s orbital)

ml = 0 (ml can be -1, 0, 1)

ms = +1/2 (It can be either +1/2 or -1/2)

total values of possible ml = 3

Only 4 parts at a time