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Quantum Numbers
Quantum Numbers
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1 Which of the following statements are false regarding the principal quantum number (n) ?
A n = 1, 2, 3...
B as n increases the energy of the electrons in it that level decreases
C as you go down a group on the periodic table n increases
D as you go across a period on the periodic table n is constant
2 The angular momentum (azimuthal) quantum number (l) (2 correct)
A describes the orbital of an electron
B has integral values of 0 to n+1
C is called an s orbital if it equals 0
D is called a d orbital if it equals 1
E is called an f orbital if it equals 2
3 The magnetic quantum number A has integral values from ­l to +l including 0
B has integral values from ­l to +l excluding 0
C indicates the position of an orbital in three dimensional space
D indicates the spin on an electron 4 How many orbitals in an atom can have the designation 4d?
A 1
B 3
C 5
D 7
1
5 How many d orbitals have the value n=2?
A 0
B 1
C 3
D 5
E 7
6 A possible set of quantum numbers for the highest energy electron of nickel is
A n = 3, l = 3, ml = 0, ms = +1/2
B n = 3, l = 2, ml = 0, ms = +1/2
C n = 4, l = -2, ml = 0, ms = +1/2
D n = 4, l = 0, ml = 0, ms = +1/2
E n = 4, l = 1, ml = 0, ms = +1/2
7 Which of the following sets of four quantum numbers may correctly describe a 4p electron?
A n = 4, l = 3, ml = 0, ms = +½
B n = 4, l = 2, ml = ­2, ms = +½
C n = 4, l = 2, ml = 1, ms = +½
D n = 4, l = 2, ml = 1, ms = ­½
E n = 4, l = 1, ml = 1, ms = +½
8 Which of the following sets of four quantum numbers may correctly describe a 3d electron?
A n = 3, l = 2, ml = ­2, ms = +½
B n = 3, l = 2, ml = 3, ms = +½
C n = 3, l = 2, ml = 0, ms = ­½
D n = 3, l = 3, ml = 0, ms = +½
E n = 3, l = 3, ml = 2, ms = +½
9 Which of the following sets of quantum numbers is incorrect?
A n = 1, l = 1, ml = 0
B n = 2, l = ­1, ml = ­1
C n = 3, l = 2, ml = ­2
D n = 4, l = 2, ml = 0
2
10 How many electrons can have the values n=1, l=0, ml=0?
A 0
B 1
C 2
D 6
E 10
11 How many electrons can have quantum numbers n=2, l=1?
A 0
B 2
C 4
D 6
E 10
12 How many orbitals can have quantum numbers of n=5 and l=4?
A 0
B 3
C 5
D 7
E 9
13How many electrons can have the quantum numbers n = 4, l = 3, ml = ­3, ms = +1/2?
A
B
C
D
E
0
1
2
4
6
3