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