Chem 1010 - General Chemistry 1 » Summer 2022 » Quiz 4
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Question #1
A photon of light has a frequency of 3.26 × 1015 hertz. What is its wavelength? The speed of light is 3.00 × 108 m/s.
A.
9.78 × 1014 nm
B.
92.0 nm
C.
109 nm
D.
978 nm
Question #2
Light has a wavelength of 444 nm. What is its frequency? The speed of light is 3.00 × 108 m/s.
A.
1.48 × 10−6 Hz
B.
6.76 × 1014 Hz
C.
1.48 × 10−15 Hz
D.
6.76 × 10−4 Hz
Question #3
Which wavelength of light is the fastest?
A.
563.8 nm
B.
All have the same speed.
C.
418.6 nm
D.
554.9 nm
Question #4
Arrange the following four electromagnetic spectral regions in order of decreasing energy. visible X-ray microwave radio
A.
X-ray, visible, microwave, radio
B.
radio, visible, X-ray, microwave
C.
X-ray, radio, visible, microwave
D.
microwave, radio, X-ray, visible
Question #5
Which azimuthal quantum numbers can exist for n = 3?
A.
l = 0, 1
B.
l = 0, 1, 2, 3
C.
l = 0, 1, 2, 3, 4
D.
l = 0, 1, 2
Question #6
How many electrons can the third principal quantum level hold?
A.
8
B.
32
C.
16
D.
18
Question #7
What is the correct electron configuration for beryllium (Be)?
A.
1s22s22p4
B.
1s22s22p6
C.
1s22s22p1
D.
1s22s2
Question #8
What is the correct electron configuration for gallium?
A.
1s22s22p63s23p64s24p1
B.
1s22s22p63s23p63d104p
C.
1s22s22p63s23p63d104s24p1
D.
1s22s22p63s23p64s24d104p
Question #9
Give the element that has the electron configuration: 1s22s22p63s23p63d104s24p65s2
A.
In
B.
Ni
C.
Sr
D.
Fe
Question #10
Nearly all the first row transition metal elements will form a +2 cation, what is the best explanation of this observation?
A.
Electrons are placed in the s-orbital before filling the d-orbtials, and the s-orbitals can hold 2 electrons.
B.
Electrons are removed from the s-orbital first because s-orbital is of higher energy than the d-orbital when there are both s- and d- electrons present.
C.
The s- and d-orbitals are very close in energy, and all of the transition elements will rearrange their electronic configuration to get filled or half-filled shells
D.
All of the +2 cations will become isoelectronic with a noble gas element, thus they are most stable.
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