Download Electrons Wksht #2 - Ector County ISD.

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Electrons Worksheet #2
A. Electrons, Orbitals, Energy Levels, and Quantum Numbers
1.
What is the maximum number of electrons that can be in the
________a) second energy level?
________b) third energy level?
________c) fourth energy level?
________________2. Which quantum number signifies the size of the electron cloud?
________________3. The sublevel or shape of the electron cloud is designated by which quantum number?
________________4. The orbital describes the direction in space of the electron cloud. Which quantum number is
used to represent the orbital?
________________5. The ms quantum number is used to describe the clockwise and counterclockwise rotation of the
electrons in an orbital. What two numerical values can ms have?
______________________6. When n has the numerical value 4, what values can l have?
__________________________7. When l = 3, what values can ml have?
_________________8. How many orbitals are contained in the p sublevel?
_________________9. How many orbitals are contained in the d sublevel?
_________________10. How many electrons can be in one orbital?
11. What is the maximum number of electrons that can be in the
_________________a) p sublevel?
_____________b) f sublevel?
_____________c) d sublevel?
_________________14. What names are used for the three p orbitals?
_________________15. What is the name of the scientist who stated that no two electrons in the same atom
can have the same set of four quantum numbers?
_________________16. What is the name of the scientist who pointed out that it is impossible to know both the exact
position and the exact momentum of an electron at the same time?
_________________17. What is the name of the scientist who treated the electron mathematically as a wave?
B. Identify the element whose last electron would have the following four quantum numbers:
11. n= 3, l= 1, ml= -1, ms= +1/2 ________________________________________
12. n= 4, l= 2, ml= +l, ms= +1/2 ________________________________________
13. n= 6, l= l, ml= 0 , ms= -1/2 ________________________________________
14.
n= 4, l= 3, ml= +3, ms= -1/2 ________________________________________
15. n= 2, l= l, ml= +l, ms= -1/2 ________________________________________
C. Write the four quantum numbers that describe the location of the last electron for the following (the atomic
number of each is given):
n
l
ml
ms
n
l
ml
ms
n
H#1
Sc#21
Nb#41
He#2
Ti#22
Mo#42
Li#3
V#23
Tc#43
Be#4
Cr#24
Ru#44
B#5
Mn#25
Rh#45
C#6
Fe#26
Pd#46
N#7
Co#27
Ag#47
O#8
Ni#28
Cd#48
F#9
Cu#29
In#49
Ne#10
Zn#30
Sn#50
Na#11
Ga#31
Sb#51
Mg#12
Ge#32
Te#52
Al#13
As#33
I#53
Si#14
Se#34
Xe#54
P#15
Br#35
Cs#55
S#16
Kr#36
Ba#56
Cl#17
Rb#37
La#57
Ar#18
Sr#38
Ce#58
K#19
Y#39
Pr #59
Ca#20
Zr#40
Nd#60
l
ml
ms
D. Which of the following represent a permissible set of quantum numbers (answer “yes” or “no”)
16. 2, 2, +l, -1/2 __________
17. 5, l, 0,+1/2 __________
18. 6, 3, -2, +1/2 __________
19. 7, 0, 0, -1/2 __________
20. 4, l, 8, +1/2 __________