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