WorksheetsChapter 5 Review Questions: Electrons in Atoms
Total questions: 41
Worksheet time: 2hrs 0mins
Name
Class
Date
1.
Which is the electron configuration of an atom in the excited state?
a)
1s22s22p2
b)
1s22s22p1
c)
1s22s22p53s2
d)
1s22s22p63s1
2.
Which atom in the ground state contains one completely filled p orbital?
a)
Ne
b)
O
c)
He
d)
Be
3.
What is the total number of electrons in the second principal energy level of a calcium atom in the ground state?
a)
6
b)
2
c)
8
d)
18
4.
What is the total number of electrons in the second principal energy level of a calcium atom in the ground state?
a)
6
b)
2
c)
8
d)
18
5.
The atom of which element in the ground state has two unpaired electrons in the 2p sublevel
a)
fluorine
b)
nitrogen
c)
beryllium
d)
carbon
6.
What is the total number of occupied s orbitals in an atom of nickel in the ground state?
a)
1
b)
2
c)
3
d)
4
7.
Which atom in the ground state has only three electrons in the 3p sub level
a)
phosphorus
b)
potassium
c)
argon
d)
aluminium
8.
What is the total number of occupied principle energy levels in a neutral atom of neon in the ground state?
a)
1
b)
2
c)
3
d)
4
9.
Which is the electron configuration of an atom in the excited state
a)
1s22s1
b)
1s22s1
c)
1s22s22p1
d)
1s22s22p2
10.
Which orbital notation correctly represents the outermost principle energy level of a nitrogen atom in the ground state
a)
(1)
b)
(2)
c)
(3)
d)
(4)
11.
Which electron configuration represents a potassium atom in the excited state?
a)
1s22s22p63s23p3
b)
1s22s22p63s13p4
c)
1s22s22p63s23p64s1
d)
1s22s22p63s23p54s2
12.
In an atom of lithium in the ground state, what is the total number of orbitals that contain only one electron?
a)
1
b)
2
c)
3
d)
4
13.
What is the total number of electrons needed to completely fill all the orbitals in an atom's second principal energy level?
a)
16
b)
2
c)
8
d)
4
14.
An atom in the excited state can have an electron configuration of
a)
1s22s2
b)
1s22p1
c)
1s22s22p5
d)
1s22s22p6
15.
What is the total number of sub levels in the fourth principal energy level
a)
1
b)
2
c)
3
d)
4
16.
Which electron configuration represents an atom in the excited state?
a)
1s22s22p63s2
b)
1s22s22p63s1
c)
1s22s22p6
d)
1s22s22p53s2
17.
Which element has atoms in the ground state with a sub level that is only half filled?
a)
helium
b)
beryllium
c)
nitrogen
d)
neon
18.
Which sublevel contains a total of five orbitals?
a)
s
b)
p
c)
d
d)
f
19.
What is the maximum number of electrons that can occupy the fourth principal energy level of an atom? (Hint: use the formula 2n2)
a)
6
b)
8
c)
18
d)
32
20.
What is the total number of unpaired electrons in an atom of oxygen in the ground state?
a)
6
b)
2
c)
8
d)
4
21.
Which of the following sub levels has the highest energy?
a)
2p
b)
2s
c)
3p
d)
3s
22.
What is the maximum number of electrons in an orbital of any atom
a)
1
b)
2
c)
6
d)
10
23.
Which orbital notation correctly represents a noble gas in the ground state?
a)
(1)
b)
(2)
c)
(3)
d)
(4)
24.
Which atom in the ground state has three half-filled orbitals?
a)
P
b)
Si
c)
Al
d)
Li
25.
What is the total number of completely filled sub-levels found in krypton in the ground state?
a)
10
b)
2
c)
8
d)
4
26.
Which term refers to the region of an atom where an electron is most likely to be found?
a)
orbital
b)
nucleus
c)
quantum
d)
spectrum
27.
An atom has the electron configuration 2-8-7. The electron dot symbol for this element is
a)
(1)
b)
(2)
c)
(3)
d)
(4)
28.
What is the total number of electrons in the second principal energy level of a calcium atom in the ground state?
a)
6
b)
2
c)
8
d)
18
29.
As an electron in an atom falls to a lower energy level, the energy of the electron
a)
decreases
b)
increases
c)
remains the same
30.
Which principal energy level change by the electron of a hydrogen atom will cause the greatest amount of energy to be absorbed?
a)
2 to 4
b)
2 to 5
c)
4 to 2
d)
5 to 2
31.
Spectral lines produced from the energy emitted from excited atoms are thought to be due to the movements of electrons
a)
from lower to higher energy levels
b)
within their nuclei
c)
from higher to lower energy levels
d)
out of the nucleus
32.
The diagram below represents the electron dot notation of an atom's valence shell in the ground state.
The diagram could represent the valence shell of
The diagram could represent the valence shell of
a)
Li
b)
Si
c)
Al
d)
Cl
33.
The principal energy level of the outermost electron of an atom in the ground state is 3. What is the total number of occupied principal energy levels contained in this atom?
a)
1
b)
2
c)
3
d)
4
34.
How many occupied energy levels are in an atom of copper in the ground state?
a)
5
b)
6
c)
3
d)
4
35.
What is the total number of valence electrons in an atom with the electron configuration 2-8-5
a)
5
b)
11
c)
3
d)
15
36.
Which electron transition is accompanied by the emission of energy?
a)
1st to 2nd
b)
2nd to 1st
c)
3rd to 5th
d)
3rd to 3rd
37.
The maximum number of electrons that the 4th energy level may contain is (Hint: use 2n2)
a)
2
b)
8
c)
18
d)
32
38.
Which is the electron configuration of an atom in the excited state?
a)
2-5
b)
2-8-8-1
c)
2-9-8-2
d)
2-8-7-1
39.
Which is the electron dot symbol of an atom of boron in the ground state?
a)
(1)
b)
(2)
c)
(3)
d)
(4)
40.
Which atom has a completely filled 3rd principal energy level?
a)
Ar
b)
Zn
c)
Ca
d)
K
41.
Which is the atomic number of an atom with six valence electrons?
a)
6
b)
8
c)
10
d)
12
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