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WorksheetsAdv CHEM Fall Mid-Term Unit 3
Total questions: 8
Worksheet time: 17mins
Name
Class
Date
1.
What are the correct quantum numbers (n, l, ml) for the seventh electron of Cl?
a)
3, 0, 0
b)
2, 1, 1
c)
2, 1, 2
d)
3, 1, 1
2.
What is the electron configuration of Mg2+?
a)
1s2 2s2 2p5
b)
1s2 2s2 2p6
c)
1s2 2s2 2p6 3s2
d)
1s2 2s2 2p6 3s2 3p2
3.
Which of the following shows the correct quantum numbers (n; l; ml) and electron configuration for the highest energy electron(s) in the ground state atoms?
a)
P:[Ne]3s23p3
n=3; l=0; ml=0
n=3; l=0; ml=0
b)
Br: [Ar]4s2 3d10 4p5
n=4; l=1; ml = −2
n=4; l=1; ml = −2
c)
Na: [Ne]3s1
n=3; l=1; ml =−1
n=3; l=1; ml =−1
d)
Ga: [Ar]4s23d104p1
n = 4; l = 1; ml = −1
n = 4; l = 1; ml = −1
4.
Write the electron-dot notation for the element O.
a)
3
b)
4
c)
5
d)
6
5.
Which valence-shell configuration could describe a neutral atom in its ground state?
a)
I
b)
II
c)
III
d)
IV
6.
Compared to a 280 nm photon, a 320 nm photon has:
a)
longer wavelength, lower frequency, lower
energy
b)
shorter wavelength, lower frequency,
lower energy
c)
longer wavelength, lower frequency,
higher energy
d)
longer wavelength, higher frequency,
higher energy
7.
Given the speed of light as 3.0×108 m/s, calculate the wavelength of the electromagnetic radiation whose frequency is 7.2×1012 Hz.
a)
4.2×10-5 m
b)
2.2×10-21 m
c)
2.4×104 m
d)
2.8×10-38 m
8.
It takes light with a wavelength of 212 nm to break the NH bond in ammonia. What energy is required and what is the NH bond strength?
a)
9.4 × 10−22 kJ/photon,
565 kJ/mol
565 kJ/mol
b)
9.4 × 10−22 kJ/photon,
565,000 kJ/mol
565,000 kJ/mol
c)
6.6 × 10−22 kJ/photon,
4 × 10−4 kJ/mol
4 × 10−4 kJ/mol
d)
6.6 × 10−22 kJ/photon,
0.40 kJ/mol
0.40 kJ/mol
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