Name: __________________________________________________________ Date: ________________________ Period: _______
Configurations of Electrons &
Quantum Numbers
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A typical electron ____________________ consists of numbers, letters, and superscripts (example-1s22s22p5),
and describes how electrons are arranged in an atom.
The coefficient number (in front) indicates the (energy level, sub-energy level, number of electrons). (circle one)
A letter indicates the (energy level, sub-energy level, number of electrons). (circle one)
A superscript indicates the number of ___________ in the orbital.
For the element represented by the electron configuration: 1s22s22p5, identify the following:
(a.)
# Energy Levels where electrons can be found ______
(b.)
# Electrons in 2p
______
(c.)
Total Electrons ______
(d.)
Element
______
Identifying Elements from Electron Configuration
Identify the element described by each electron configuration.
1.
1s22s22p63s1
2.
1s22s22p63s23p64s23d104p65s24d6
3.
1s22s22p63s23p64s23d8
4.
[Xe] 6s2
5.
[Ar]4s23d104p3
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Electron Configuration Errors
Determine if the following electron configurations are correct (Y/N). If NO, explain what is wrong.
6.
1s22s22p63s23p64s24d104p65s1
_________
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7.
1s22s22p63s3
_________
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8.
[Rn] 7s25f96d2
_________
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9.
[Ar] 5s24d105p5
_________
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20.
[Xe] 6s24f10
_________
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Electron Configurations for Neutral Atoms
Write the entire, full electron configuration (do not use the Noble Gas shortcut) for each neutral atom given. Neutral
atoms have the same number of protons and electrons.
21.
22.
23.
24.
25.
Na
Sr
Cl
Ti
Pd
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Electron Configurations for Neutral Atoms
Use the Noble Gas shortcut to write the electron configuration for each neutral atom given.
26.
27.
28.
29.
30.
Na
Sr
Cl
Ti
Pd
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More Quantum Practice
 Quantum #s predict the location of a specific electrons by identifying where we can find the electron ____ % of
the time.
 The electrons with the highest amount of __________ are the electrons most likely to react in chemistry.
 These electron is called the ____________ electrons, and are the electrons that fill _________ in Aufbau
diagrams and electron configurations.
31.
Which electron is highest in energy? (circle one)
1s1 2s1 2p1 3p1 2d1 3d1
32.
Arrange the following in order of lowest energy to highest energy.
3s1 4s1 3p1 4p1 3d1 4d1
33.
34.
35.
35.
36.
For this element, 1s22s22p63s23p64s23d8 , the electrons that have the highest energy are located in which energy
level ? __________ (write number)
For this element, 1s22s22p63s23p64s23d8 , the electrons that fill last are located in which type of sub-energy
level? __________ (write letter)
For this element, 1s22s22p63s23p64s23d8 , how many valence electrons are there? _____
For this element, 1s22s22p63s23p64s23d8 , determine Principle (n) and Angular Quantum (l) #s of the electron
with the highest amount of energy.
n = ________
l = _________
Complete the table for each element
Element
Sodium
Strontium
Chlorine
Titanium
Palladium
# valence e-
Principle Quantum # Angular Quantum #
for the electron with for the electron with
the highest energy
the highest energy