WorksheetsUnit 5 Electrons Review
Total questions: 32
Worksheet time: 16mins
During a flame test, crystals of an element are passed through the Bunsen burner flame. The flame turns a violet color. What can be concluded from this violet colored flame?
electrons are moving fast to make a short wavelength
electrons are moving slow to produce a long wavelength
electrons are moving fast to make a long wavelength
electrons are moving slow to make a short wavelength
Four different compounds are burned in a flame test. One compound produces a yellow color, one a blue color, one an indigo color, and one a red color. Which compound’s electrons had the GREATEST energy?
yellow
blue
indigo
red
Bohr’s model of the atom had electrons moving in specific paths (called orbits) around the nucleus. This model of the atom is known as the:
plum pudding model
nuclear atom model
quantum mechanical model
planetary model
What is the name for the lowest, most stable energy state of an atom?
excited state
ground state
elementary state
quantum state
When an electron moves from the excited state to the ground state which of the following has occurred?
an electron absorbs light
an electron moves from a lower energy level to a higher energy level
an electron emits light
nothing occurs
Which of the following is a statement of the quantum mechanical model of the atom? (you may choose more than one
electrons move in orbitals around the nucleus
electrons move in orbits around the nucleus
electrons move as both particles and waves
electrons move in one path and if close to the nucleus get sucked in
Which of the following can be concluded based on research by De Broglie?
electrons behave as particles only
electrons behave as waves only
electrons behave as neither particles nor waves
electrons behave as both particles and waves
A three dimensional region around the nucleus where there is a high probability of finding an electron is a(n):
energy level
nucleus
orbit
orbital
The electron configuration of the N3- ion is:
1s22s22p3
1s22s22p2
1s22s22p43s2
1s22s22p6
The electron configuration of the K+1 ion?
1s22s22p63s23p64s1
1s22s22p63s23p6
1s22s22p63s23p64s2
1s22s22p63s24s1
The lowest sublevel in each energy level is represented by which letter?
s
p
d
f
Which electron transition results in the emission of light?
3p to 3s
2s to 2p
3p to 4p
1s to 2s
Which element has the following electron configuration: 1s22s22p63s23p4?
Sodium
Sulfur
Carbon
Beryllium
What can you conclude from the figure below?
Aufbau order has been violated
Pauli exclusion principle has been violated
Hund's rule has been violated
No rule has been violated
Electrons in the outermost energy level are called:
outer space electrons
valence electrons
outback electrons
Van der Graff electrons
The sublevels in the outermost energy levels are always the _________ sublevels.
d and p
f and d
s
s and p
Examine the following electron configuration:
1s22s22p63s23p64s23d104p1.What are the valence energy levels?
4s23d104p1
4p1
3d10
4s24p1
What can you conclude from the figure below?
Aufbau order was violated
Pauli exclusion principle was violated
Hund's rule was violated
No rule was violated
When writing an electron dot structure, what do the dots represent?
total electrons
electrons in valence energy levels
protons in an atom
protons plus neutrons in an atom
Examine the following electron configuration: 1s22s22p63s23p64s23d8. Which energy level is farthest from the nucleus?
2
3
4
8
When writing an electron dot structure, what does the element symbol represent?
valence electrons
nucleus only
inner level electrons only
nucleus and inner level electrons
Examine the following electron configuration: 1s22s22p63s1. How many valence electrons does this element contain?
1
3
6
7
Which of the following is the correct
electron dot structure for beryllium?
None of the above
What states that electrons occupy the lowest energy levels first?
Pauli Exclusion Theory
Hund's Rule
Aufbau's Principle
Dalton's theory
Which elements on the periodic table have a full shell?
alkali metals (group 1A)
transition metals (group B)
alkaline earth metals (group 2A)
noble gases (group 8A)
How many valence electrons does the element selenium contain?
34
2
6
8
What is the maximum number of valence
electrons any element can contain?
2
4
6
8
To easily find the valence electron number for any element, simply look on the periodic table at the ____________.
group number
period number
atomic number
oxidation number
Examine the following electron configuration: 1s22s22p63s2. How many unpaired electrons does this element contain?
0
1
2
3
What states that electrons must fill empty orbitals before they can pair up?
Aufbau's principle
Hund's rule
Pauli exclusion principle
Heinsberg's Uncertainty principle
Which wave is the fastest/most damaging moving according to the electromagnetic spectrum?
AM/FM Radio waves
gamma waves
infrared waves
ultraviolet waves
visible light waves
Which wave is the only wave you can see with your eyes according to the electromagnetic spectrum?
AM/FM Radio waves
gamma waves
infrared waves
ultraviolet waves
visible light waves
