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Chemistry Ch.5 Review For Test
Test Description: Review for electrons in atoms chapter
Instructions: Answer all questions to get your test result.
1) What is a region of high probability of finding an electron?
A
atomic orbital
B
ground state
C
aufbau principle
D
electron configuration
2) What is the tendency of electrons to enter orbitals of lowest energy first?
A
Hund's Rule
B
Pauli Exclusion principle
C
Aufbau principle
D
ground state
3) How does the energy of an electron change when the electron moves closer to the nucleus?
A
it decreases
B
it stays the same
C
it doubles
D
it increases
4) What is the maximum number of electrons in the third principal energy level?
A
2
B
8
C
32
D
18
5) When an electron moves from a lower to a higher energy level, the electron
A
moves closer to the nucleus
B
always doubles its energy
C
absorbs a quantum of energy
D
absorbs a continuously variable amount of energy
6) What types of atomic orbitals are in the second principal energy level?
A
s, p
B
s, p, d
C
s, p, d, f
D
s
7) What is the number of electrons in the outermost energy level of a phosphorus atom?
A
6
B
2
C
3
D
5
8) What is the electron configuration of calcium?
A
1s22s22p63s23p64s2
B
1s22s22p63s2
C
1s22s22p63s23p64s1
D
1s22s22p63s1
9) How many unpaired electrons are in an oxygen atom?
A
0
B
2
C
1
D
3
10) Stable electron configurations are likely to contain
A
unfilled s orbitals
B
filled energy sublevels
C
fewer electrons than unstable configurations
D
electrons with a clockwise spin
11) Which electron configuration of the 5d energy sublevel is the most stable?
A
5d7
B
5d8
C
5d10
D
5d
12) Which color of visible light has the longest wavelength?
A
red
B
violet
C
green
D
blue
13) Which of the following electromagnetic waves has the lowest frequencies?
A
visible light
B
gamma rays
C
microwaves
D
x-rays
14) What is the electron configuration of a neutral atom of fluorine?
A
1s22s22p6
B
1s22s22p4
C
1s22s22p5
D
1s22s22p63s23p6
15) How many electrons are in the highest occupied energy level of a neutral rubidium atom?
A
0
B
1
C
2
D
3
16) What is the frequency of of ultraviolet light with a wavelength 3.29 x 10^-7 m? The speed of light is 3 x 10^8 m/s.
A
9.1 x 10^14 Hz
B
9.1 x 10^1 Hz
C
9.1 x 10^15 Hz
D
1.1 x 10^-15 Hz
17) Which variable is directly proportional to frequency?
A
position
B
energy
C
wavelength
D
velocity
18) The quantum mechanical model of the atom ____________.
A
none of the choices
B
involves the probability of finding an electron in a certain position
C
was proposed by Niels Bohr
D
defines the exact path of an electron around the nucleus
19) How many unpaired electrons does a magnesium atom have?
A
1
B
3
C
0
D
2
20) How many valence electrons are in an iron atom?
A
4
B
8
C
2
D
6
*select an answer for all questions
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