Chemistry
10th Edition
ISBN: 9781305957404
Author: Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher: Cengage Learning
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Transcribed Image Text:9:18
ul LTE O
( Files
Chemistry R110
Oxnard College
Week 14
Example #1:
а) Ag
total electrons
b) Cl
total electrons
c) Ca
total electrons
Part B – Writing Electron Configurations
Within an atom, electrons reside in orbitals that are located at specific, 1
nucleus. These orbitals are specified by both a number and a letter. The
quantum number (n= 1, 2, 3, ..), specifies the principle shell. The prin
nucleus (smaller n value) are at a lower energy than those further from t
Within each principle shell, there are subshells (specified by the letters:
areas where the probability of finding an electron is greatest.
Writing electron configurations can be thought of as 'filling' the electro
energy orbital first. The order in which the orbitals should be filled can
below. Starting at 1s, the red arrows and dotted lines follow the order of
diagram demonstrates, the 3d subshell begins filling only after the 4s ha
subshells can also be partially filled if the element does not have enoug
Page 6
![9:18
ul LTE O
( Files
Page 6
Chemistry RI10
Oxnard College
Week 14- Hydrogen Absorption and Emission
Fall 2020
The maximum amount of electrons you can place in a specific subshell depends on the shape of the
subshell (represented by the letters s, p. d, or f). Once a subshell is full (contains the maximum number of
electrons), the next subshell then begins filling. The maximum number of electrons that can be placed in a
specific subshell is shown below:
Махimum
Subshell Number of
Electrons
P
f
14
The number of electrons that are contained within a specific subshell are represented as a numerical
superscript. For example, the electron configuration for lithium (Li), which has 3 total electrons, is 1s'2s'.
This shows that 2 electrons exist in the 1s subshell and 1 electron exists in the 2s subshell.
Write the complete electron configuration for each of the following elements:
Practice
a) Si
1s'2s2p'3s*3p?
b) Co Is2s2p'3s²3p^4s°3d?
Example #2:
a) Na
b) Mn
Electron configurations can also be written in the shorthand noble gas form, which is especially useful for
larger atoms that have many electrons. If we take a look at the electron configuration for sodium (Na), for
example, it contains the electron configuration of the noble gas neon (Ne), plus one additional electron.
We can put this noble gas in brackets and then write the rest of the electron configuration next to it, as
shown below:
Is°2s*2p®3s! = [Ne] 3s'
Electrne
configuration of Ne
Page 7](https://content.bartleby.com/qna-images/question/50ac87a2-3dea-40dd-9a88-5460e40527f7/798a0760-af52-4012-a20d-b58268bd98e9/al0z446_processed.jpeg)
Transcribed Image Text:9:18
ul LTE O
( Files
Page 6
Chemistry RI10
Oxnard College
Week 14- Hydrogen Absorption and Emission
Fall 2020
The maximum amount of electrons you can place in a specific subshell depends on the shape of the
subshell (represented by the letters s, p. d, or f). Once a subshell is full (contains the maximum number of
electrons), the next subshell then begins filling. The maximum number of electrons that can be placed in a
specific subshell is shown below:
Махimum
Subshell Number of
Electrons
P
f
14
The number of electrons that are contained within a specific subshell are represented as a numerical
superscript. For example, the electron configuration for lithium (Li), which has 3 total electrons, is 1s'2s'.
This shows that 2 electrons exist in the 1s subshell and 1 electron exists in the 2s subshell.
Write the complete electron configuration for each of the following elements:
Practice
a) Si
1s'2s2p'3s*3p?
b) Co Is2s2p'3s²3p^4s°3d?
Example #2:
a) Na
b) Mn
Electron configurations can also be written in the shorthand noble gas form, which is especially useful for
larger atoms that have many electrons. If we take a look at the electron configuration for sodium (Na), for
example, it contains the electron configuration of the noble gas neon (Ne), plus one additional electron.
We can put this noble gas in brackets and then write the rest of the electron configuration next to it, as
shown below:
Is°2s*2p®3s! = [Ne] 3s'
Electrne
configuration of Ne
Page 7
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