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WorksheetsElectrons in Atoms
Total questions: 53
Worksheet time: 31mins
Which element is represented by the electron configuration 1s22s22p2?
Be
He
C
O
none of these
The product of the frequency and the wavelength of a wave equals the
number of waves passing a point in a second
speed of the wave
distance between wave crests
time for one full wave to pass
The frequency of electromagnetic is measured in waves per second or
nanometers
quanta
hertz
joules
The distance between two successive peaks on adjacent waves is its
frequency
wavelength
quantum number
velocity
For electromagnetic radiation, c (the speed of light) equals
frequency minus wavelength
frequency plus wavelength
frequency divided by wavelength
frequency times wavelength
According to the quantum theory of an atom, in an orbital
an electron's position cannot be known precisely
an electron has no energy
electrons cannot be found
electrons travel around the nucleus on paths of specific radii
A three-dimensional region around a nucleus where an electron may be found is called a(n)
spectral line
electron path
orbital
orbit
How many quantum numbers are needed to describe the energy state of an electron in an atom?
1
2
3
4
The letter designations for the first four sublevels with the maximum number of electrons that can be accommodated in each sublevel are
s:2, p:4, d:6, f:8
s:1, p:3, d:5, f:7
s:2, p:6, d:10, f:14
s:1, p:2, d:3, f:4
The spin quantum number (ms) indicates that the number of possible spin states for an electron in an orbital is
1
2
3
5
The number of orbitals for the d sublevel is
1
3
5
7
A single orbital in the 3d sublevel can hold ___ electrons.
10
2
3
6
If the third main energy level contains 15 electrons, how many more could it possibly hold?
0
1
3
17
At n=1, the total number of electrons that could be found is
1
2
6
18
The ground state electron configuration for sodium is
1s22s22p63s1
1s22s22p6
1s22s22p63s2
1s22s22p7
What shape is a p orbital?
spherical
dumbbell
cloverleaf
varied
How many electrons are needed to completely fill the fourth energy level?
8
18
32
40
For the f sublevel, the number of orbitals is
5
7
9
18
A g sublevel would theoretically have how many orbitals?
5
7
9
11
The statement that an electron occupies the lowest available energy level is
Hund's Rule
the Aufbau principle
Bohr's law
the Pauli exclusion principle
Which of the following rules requires that each of the p orbitals in a particular energy level receive one electron before any of them can have two electrons?
Hund's Rule
the Pauli exclusion principle
the Aufbau principle
the quantum rule
The atomic sublevel with the next highest energy after 4p is
4d
4f
5p
5s
The number of electrons in the highest energy level of the argon atom (atomic number 18) is
10
2
6
8
The principal quantum number (n)
specifies the sublevel of the orbital
specifies the principal energy level of the orbital
specifies the 3-D shape of the orbital
specifies the maximum number of electrons
none of these
How many electrons are unpaired in the orbitals of nitrogen?
14
5
3
9
none of these
The number of cycles of a wave that pass a stationary point in one second is called its
frequency
trough
wavelength
crest
none of these
The distance between adjacent wave crests is called
nu
wavelength
frequency
trough
none of these
Which sublevel letter corresponds to a spherical orbital?
p
d
s
f
What is the element in which at least one electron is in the d-orbital?
Ca
Sc
K
Ar
none of these
How many electrons can occupy the s orbitals at each energy level?
two, if they have opposite spins
two, if they have the same spin
one
no more than eight
The Pauli exclusion principle states that no two electrons in the same atom can
occupy the same orbital
have the same spin quantum numbers
have the same set of 4 quantum numbers
be at the same main energy level
The electron configuration for the carbon atom (C) is 1s22s22p2. The atomic number of carbon is
3
6
11
12
In the electron configuration for scandium (atomic number 21), what is the notation for the three highest-energy electrons?
4s23d1
4s3
3d3
4s24p1
The element with an electron configuration of 1s22s22p63s23p2 is
Mg
C
S
Si
One main energy level can hold 18 electrons. What is n?
+1/2
3
6
18
Which of the following lists atomic orbitals in the correct order they are filled according to the Aufbau principle?
1s 2s 2p 3s 4s 3p 3d 4p 5s
1s 2s 2p 3s 3p 4s 3d 4p 5s
1s 2s 2p 3s 3p 4s 4p 3d 4d
1s 2s 2p 3s 3p 3d 4s 4p 5s
Which of the following is not an example of an electromagnetic wave?
X-ray
ultraviolet wave
radio wave
water wave
Who established that electrons show both particle and wavelike behavior?
Louis de Broglie
Erwin Schrodinger
Werner Heisenberg
Niels Bohr
Who is given credit for coming up with the quantum mechanical model of the atom?
Louis de Broglie
Erwin Schrodinger
Werner Heisenberg
Niels Bohr
What is the L quantum number for the d sublevel?
0
1
2
3
If n is the principal quantum number of a main energy level, the number of electrons in that energy level is
n
2n
n2
2n2
If n is the principal quantum number of a main energy level, the number of orbitals in that energy level is
n
2n
n2
2n2
At n = 20, the maximum number of electrons is
20
40
400
800
How many electrons would a Na+ ion have?
11
12
10
23
How many electrons would a S2- ion have?
16
18
14
32
A sound wave is an example of a(n)
transverse wave
longitudinal wave
exemplary wave
existential wave
What is the name for the current model of the atom?
Bohr model
quantum mechanical model
Rutherford model
Manhattan Project model
The electron configuration of aluminum (atomic number 13) is
1s22s22p33s23p33d1
1s22s22p63s22d1
1s22s22p63s23p1
1s22s22p9
If the s and p sublevels of the highest main energy level of an atom are filled, how many electrons are in this main energy level?
2
8
16
32
A d orbital can be described by what shape?
spherical
dumbbell
cloverleaf
varied
What is the wavelength (in meters) of an electromagnetic wave with a frequency of 4.9 x 1015 Hz?
What is the frequency (in Hertz) of an electromagnetic wave that has a wavelength of 3.9 x 1012 m?
How much energy (in Joules) does an electromagnetic wave have if its frequency is 9.4 x 10-2 Hz?
