The number of elements present in periods 3 and 4 of the periodic table is to be listed. The difference that lies in these numbers is to be explained. Concept Introduction: Elements are arranged in the order of increasing atomic number in periodic table. From the periodic table, physical, chemical properties, electronic configuration of the elements can be determined. The principal quantum number ( n ) specifies the principal shell of the orbital. As the value of principal quantum number increases, the energy of the orbital also increases. The possible values of principal quantum number are 1, 2, 3….
The number of elements present in periods 3 and 4 of the periodic table is to be listed. The difference that lies in these numbers is to be explained. Concept Introduction: Elements are arranged in the order of increasing atomic number in periodic table. From the periodic table, physical, chemical properties, electronic configuration of the elements can be determined. The principal quantum number ( n ) specifies the principal shell of the orbital. As the value of principal quantum number increases, the energy of the orbital also increases. The possible values of principal quantum number are 1, 2, 3….
Solution Summary: The author explains that the number of elements present in periods 3 and 4 of the periodic table is listed on the basis of principal quantum number.
Definition Definition Number of protons in the nucleus of an atom. It uniquely identifies an element, as the number of protons determines the element's properties. The periodic table of elements is arranged based on increasing atomic numbers, allowing scientists to easily locate and study elements.
Chapter 9, Problem 72E
Interpretation Introduction
Interpretation: The number of elements present in periods 3 and 4 of the periodic table is to be listed. The difference that lies in these numbers is to be explained.
Concept Introduction: Elements are arranged in the order of increasing atomic number in periodic table.
From the periodic table, physical, chemical properties, electronic configuration of
the elements can be determined.
The principal quantum number (n) specifies the principal shell of the orbital.
As the value of principal quantum number increases, the energy of the orbital also
increases.
The possible values of principal quantum number are 1, 2, 3….
A small artisanal cheesemaker is testing the acidity of their milk
before it coagulates. During fermentation, bacteria produce lactic
acid (K₁ = 1.4 x 104), a weak acid that helps to curdle the milk and
develop flavor. The cheesemaker has measured that the developing
mixture contains lactic acid at an initial concentration of 0.025 M.
Your task is to calculate the pH of this mixture and determine whether
it meets the required acidity for proper cheese development. To
achieve the best flavor, texture and reduce/control microbial growth,
the pH range needs to be between pH 4.6 and 5.0.
Assumptions:
Lactic acid is a monoprotic acid
H
H
:0:0:
H-C-C
H
:0:
O-H
Figure 1: Lewis Structure for Lactic Acid
For simplicity, you can use the generic formula HA to represent the acid
You can assume lactic acid dissociation is in water as milk is mostly water.
Temperature is 25°C
1. Write the K, expression for the dissociation of lactic acid in the space provided. Do not forget to
include state symbols.…
Curved arrows are used to illustrate the flow of electrons. Using the provided starting and product
structures, draw the curved electron-pushing arrows for the following reaction or mechanistic step(s).
Be sure to account for all bond-breaking and bond-making steps.
:0:
:0
H.
0:0
:0:
:6:
S:
:0:
Select to Edit Arrows
::0
Select to Edit Arrows
H
:0:
H
:CI:
Rotation
Select to Edit Arrows
H.
<
:0:
:0:
:0:
S:
Chapter 9 Solutions
Introductory Chemistry Plus Mastering Chemistry with Pearson eText -- Access Card Package (6th Edition) (New Chemistry Titles from Niva Tro)
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