WorksheetsThe Electron Comprehensive Unit Review
Total questions: 55
Worksheet time: 41mins
The electron configuration of an element is closely related to the atom's position on the periodic table. Which of the following represents the correct positions for sublevels on the periodic table?
An element has an electron configuration of 1s22s22p63s1. Using the image, which letter would be in the same group?
W
X
Y
Z
Light will be produced when _____
electrons absorb energy as they move to an excited state.
electrons release energy as they move to an excited state.
electrons absorb energy as they return to the ground state.
electrons release energy as they return to the ground state.
How many valence electrons does this element have? 1s22s22p4
2
4
6
8
Which element has seven valence electrons?
Nitrogen (N)
Carbon (C)
Fluorine (F)
None of these choices are correct.
Which of the following orbital diagrams is incorrect?
An electron further away from the nucleus has _____.
less mass
less energy
more mass
more energy
Sulfur is represented by the following Lewis dot structure: Which of the elements has the same Lewis structure?
Chlorine
Magnesium
Oxygen
Phosphorus
Which color in the visible spectrum has the lowest frequency?
Red
Green
Blue
Violet
Which statement regarding red and green visible light is correct? (Hint: ROYGBIV)
The speed of green light is greater than that of red light.
The frequency of green light is lower than that of red light.
The frequency of green light is the same as red light.
The frequency of green light is higher than that of red light.
What is the correct Lewis dot structure for Arsenic?
What is the correct Lewis dot structure for the fluorine ion?
Which best describes the current atomic theory?
Solar System Model/Planetary Model
Bowling Ball Model
Quantum Mechanical Model
Plum Pudding Model
A green flame is seen when copper (II) is burned. How is the green light (photon) emitted?
When the protons, after being excited, fall to a lower energy level.
When the electrons are excited and move to a higher energy level.
When the protons are excited and move to a higher energy level.
When the electrons, after being excited, fall to a lower energy level.
Which is true of the waves A and B shown in the image?
A has a lower frequency and a shorter wavelength than B.
A has a higher frequency and a shorter wavelength than B.
A has a lower frequency and a longer wavelength than B.
A has a higher frequency and a longer wavelength than B.
The most electronegative element is _____.
Cl
F
Br
I
Fluorine is an element that attracts electrons. Compared to other elements, fluorine easily attracts electrons because of its size. If fluorine gains one electron, we call it a/an _____.
neutral atom
anion
cation
A beryllium (Be2+) cation has _____.
gained two electrons.
lost two protons.
gained two protons.
lost two electrons.
Which of the following lists the atoms in order from least to greatest 1st ionization energy?
Cl, S, P
He, Ne, Ar
Rb, Na, Li
F, As, Ba
Which of the following is true about Na, Cs, and electronegativity?
Na is less electronegative than Cs because Na has less valence electrons.
Na is more electronegative than Cs because Na has less shielding.
Na is more electronegative than Cs because Na has a greater atomic radius.
Na is less electronegative than Cs because Na has more valence electrons.
What element does 1s2 2s2 2p6 3s2 3p6 4s2 represent?
Mg
Ca
K
Ar
Which orbital diagram represents an atom that is a noble gas?
A certain element has a ground state electron configuration of 1s22s22p63s23p6. Which letter represents the position of this element on the periodic table?
W
X
Y
Z
How many valence electrons does 1s2 2s2 2p6 3s2 3p2 possess?
1
2
3
4
Which of the following is the correct noble gas configuration for potassium (K)?
[Kr]5s1
[Ar]4s1
[Kr]5s23d6
[Ar]3s2
Identify the element: [Kr] 5s2 4d2
Sr
Ge
Ti
Zr
How many electrons may occupy a d-sublevel?
8
14
6
10
Which element has an electron located in a “p” orbital?
C
He
Be
Li
Choose the correctly matched element with its information.
K: period 4, alkali metal
Al: period 2, metalloid
Kr: 5 energy levels, noble gas
N: 8 valence electrons, halogen
Which group number would have this Lewis dot configuration?
15
16
5
2
Which color of light would have the highest energy associated with it?
Red
Yellow
Green
Blue
If Bromine gains one electron, the resulting ion will be _____ the parent atom (Br).
larger than
smaller than
the same size as
one half the size of
In order to have a full valence energy level, phosphorus will _____.
gain 3 electrons
lose 5 electrons
lose 3 electrons
gain 5 electrons
As the wavelength of light increases, the frequency and energy both _____.
increase
decrease
remain the same
approach the speed of light.
Renee is making a chart of the electromagnetic waves that make up the electromagnetic spectrum. Which statement is true about electromagnetic waves and will help her organize them in the chart?
Different types of waves have different frequencies, but the same wavelength.
Different types of waves have different frequencies and wavelengths, but travel at the same speed.
Different types of waves travel at different speeds, but have the same frequency.
Different types of waves travel at different speeds and have different frequencies and wavelengths.
Which best describes the current atomic theory?
Atoms consist of electrons circling in definite orbits around a positive nucleus.
Atoms can easily be split, at which time they become radioactive.
Atoms are composed of electrons moving randomly in a probable location around the nucleus.
An atom’s mass is determined by the mass of its neutrons.
According to quantum mechanics, what is the maximum number of electrons that can occupy the third energy level in a ground state atom?
2
8
4
18
Which element has this electron configuration: 1s22s22p63s23p64s23d10
Zn
Cu
Ti
Ni
Compared to an electron in the first electron shell of an atom, an electron in the third shell of the same atom has _____.
less mass.
less energy.
more mass.
more energy.
An element has an electron configuration of 1s22s22p63s2. Which of these will be in the same group as this element?
1s2 2s2 2p6
1s2 2s2 2p6 3s2 3p6 4s2
1s2 2s2 2p6 3s1
1s2 2s2 2p6 3s2 3p6
Consider the spectrum for the hydrogen atom. In which situation will light be produced?
Electrons absorb energy as they move to an excited state.
Electrons release energy as they move to an excited state.
Electrons absorb energy as they return to the ground state.
Electrons release energy as they return to the ground state.
Given the electronic configuration of 1s22s22p4, how many electrons does this element have in its outer level?
2
4
6
8
According to the above figure, which element has seven valence electrons?
Nitrogen
Fluorine
Carbon
Lithium
Which of the following orbital diagrams is incorrect because it violates Hund’s rule?
Using the image, which of the following is most likely the electronegativity value for chlorine?
2.3
2.7
3.0
4.2
Which list contains elements with similar chemical reactivity?
Li, Be, C
Be, Mg, Sr
Sc, Y, Zr
C, N, O
Using the image, how many dots would you draw for the Lewis dot structure of carbon?
6
1
2
4
A sulfur anion has _____
gained two protons.
lost two electrons.
gained two electrons.
lost two protons.
When comparing xenon (Xe) and chlorine (Cl), which element has the highest electronegativity and why.
Xe has the highest electronegativity because it has more valence electrons.
Xe has the highest electronegativity because it has more energy levels.
Cl has the highest electronegativity because it has less shielding.
Cl has the highest electronegativity because it has more valence electrons.
What is the correct Lewis dot structure for the Fluorine ion?
Which two characteristics are associated with the Alkali (Group 1) and Alkaline Earth Metals (Group 2)?
High first ionization energy and high electronegativity.
Low first ionization energy and low electronegativity.
Low first ionization energy and high electronegativity.
High first ionization energy and low electronegativity.
Choose the correctly matched information with the correct element.
5 valence electrons, diatomic: N
Period 2, metalloid: Al
5 energy levels, noble gas: Kr
Period 4, alkali metal: Ca
Sequence the following atoms from greatest to least electronegativity: Ca, As, Fe.
Ca, Fe, As
As, Fe, Ca
Fe, Ca, As
Ca, As, Fe
Which of these is the correct electron configuration for an aluminum cation Al3+?
1s22s22p63s23p6
1s22s22p6
1s22s22p53p5
1s22s22p63s23p1
An atom in the ground state contains a total of 5 electrons, 5 protons, and 5 neutrons. Which Lewis electron dot diagram represents this atom?
