Chem 210 Final exam study guide, Questions and
Correct Answers, 2024. With complete solution.
What is ground state electron configuration of Co?
[Ar]3d^9
[Ar]4s^1 3d^8
[Ar]4s^2 3d^7
[Ar]4s^2 4p^6 4d^1
[Ar]4s^2 3d^7
molybdenum has an anomalous electron configuration. using the shorthand
notation for electron configurations, write the electron configuration
A) [kr]5s 4d^6
B) [kr]5s 4d^0 5p^6
C) [kr]5s^1 4d^5
D) [kr]5s^2 4d^4
C) [kr]5s^1 4d^5
the symbol [Kr] represents
a) 4s^2 4p^6
b) 1s^2 2s^2 2p^6 3s^6 4s^2 4p^6
c) 1s^2 2s^2 2p^6 3s^6 4s^2 3d^10 4p^6
D)1s^2 2s^2 2p^6 3s^6 4s^2 3d^10 4p^6 4d^10
c) 1s^2 2s^2 2p^6 3s^6 4s^2 3d^10 4p^6
What is the wavelength of UV light in the balmer series when m=2 and n=7?
a) 0.00252 nm
b) 397 nm
c)337 nm
d)0.00297 nm
b) 397 nm
How many electrons can a single orbital hold?
A) 2n
B) 2
C) 2l+1
D)8
B) 2
What are the possible values of I and m1 for an electron in a 5d orbitial?
A) I=0 and mI=0
B) I=3 and MI=-2,-1,0,+1, or +2
c) I=1 and MI=-1,0,+1
D) I=2 and MI=-2,-1,0,+1, +2
D) I=2 and MI=-2,-1,0,+1, +2
What is the the de Broglie wavelength of an electron (m=9.11e-31 kg) moving at a
velocity of 3.0e7m/s?
a) 3.9e-12
b)2.4e-11
, c)3.3e-8
d)1.1e-4
b)2.4e-11
What is the frequency of a helium-neon laser light with a wave of 632.8 nm?
a) 4.47e14 s-1
b)4.47e5 s-1
c)2.11e-15 s-1
d)1.58e-15 s-1
a) 4.47e14 s-1
What is the correct nuclear symbol for the unknown product "X" in the nuclear
equation shown below?
A)234
TH
90
B) 226
Ra
88
C) 234
U
90
D) 242
Pu
94
E) 234
Pu
94
A)234
TH
90
The alpha particle is
A)1
1H
B)2
1H
C)3
1H
D)4
2 He
D)4
2 He
15. An element has two naturally occurring isotopes. One has an abundance of
37.40% and an isotopic mass of 184.953 amu, and the other has an abundance of
62.60% and a mass of 186.956 amu. What is the atomic weight of the element?
A) 185.7 amu
B) 186.0 amu
Correct Answers, 2024. With complete solution.
What is ground state electron configuration of Co?
[Ar]3d^9
[Ar]4s^1 3d^8
[Ar]4s^2 3d^7
[Ar]4s^2 4p^6 4d^1
[Ar]4s^2 3d^7
molybdenum has an anomalous electron configuration. using the shorthand
notation for electron configurations, write the electron configuration
A) [kr]5s 4d^6
B) [kr]5s 4d^0 5p^6
C) [kr]5s^1 4d^5
D) [kr]5s^2 4d^4
C) [kr]5s^1 4d^5
the symbol [Kr] represents
a) 4s^2 4p^6
b) 1s^2 2s^2 2p^6 3s^6 4s^2 4p^6
c) 1s^2 2s^2 2p^6 3s^6 4s^2 3d^10 4p^6
D)1s^2 2s^2 2p^6 3s^6 4s^2 3d^10 4p^6 4d^10
c) 1s^2 2s^2 2p^6 3s^6 4s^2 3d^10 4p^6
What is the wavelength of UV light in the balmer series when m=2 and n=7?
a) 0.00252 nm
b) 397 nm
c)337 nm
d)0.00297 nm
b) 397 nm
How many electrons can a single orbital hold?
A) 2n
B) 2
C) 2l+1
D)8
B) 2
What are the possible values of I and m1 for an electron in a 5d orbitial?
A) I=0 and mI=0
B) I=3 and MI=-2,-1,0,+1, or +2
c) I=1 and MI=-1,0,+1
D) I=2 and MI=-2,-1,0,+1, +2
D) I=2 and MI=-2,-1,0,+1, +2
What is the the de Broglie wavelength of an electron (m=9.11e-31 kg) moving at a
velocity of 3.0e7m/s?
a) 3.9e-12
b)2.4e-11
, c)3.3e-8
d)1.1e-4
b)2.4e-11
What is the frequency of a helium-neon laser light with a wave of 632.8 nm?
a) 4.47e14 s-1
b)4.47e5 s-1
c)2.11e-15 s-1
d)1.58e-15 s-1
a) 4.47e14 s-1
What is the correct nuclear symbol for the unknown product "X" in the nuclear
equation shown below?
A)234
TH
90
B) 226
Ra
88
C) 234
U
90
D) 242
Pu
94
E) 234
Pu
94
A)234
TH
90
The alpha particle is
A)1
1H
B)2
1H
C)3
1H
D)4
2 He
D)4
2 He
15. An element has two naturally occurring isotopes. One has an abundance of
37.40% and an isotopic mass of 184.953 amu, and the other has an abundance of
62.60% and a mass of 186.956 amu. What is the atomic weight of the element?
A) 185.7 amu
B) 186.0 amu
