
(a)
Interpretation : The number of protons, neutrons,and electrons present in each pair of isotopes is to be calculated.
Concept Introduction : Isotopes are the elements having same
(a)

Answer to Problem 34LC
In
In
Explanation of Solution
The count of protons present in the nucleus of the atom gives the atomic number.
The count of protons and neutrons present in the nucleus of the atom gives the mass number.
The general representation
Where,
The number of protons, number of electrons, and atomic number are always equal for a given
So, for the given isotopes of Lithium, there are
The formula to calculate the number of neutrons is given as:
In the given isotope
Substitute the values in the above formula to calculate the number of neutrons.
Similarly, calculate the number of neutrons in the given isotope
In
Substitute the values in the above formula to calculate the number of neutrons.
The number of neutrons in
(b)
Interpretation : The number of protons, neutrons,and electrons present in each pair of isotopes is to be calculated.
Concept Introduction : Isotopes are the elements having same atomic number but different mass numbers. An element can have two or more isotopes.
(b)

Answer to Problem 34LC
In
In
Explanation of Solution
The count of protons present in the nucleus of the atom gives the atomic number.
The count of protons and neutrons present in the nucleus of the atom gives the mass number.
The general representation symbol of an element is given as
Where,
The number of protons, number of electrons, and atomic number are always equal for a given element of the isotope.
So, for the given isotopes of Calcium, there are
The number of neutrons in an element is the difference between the mass number and the number of protons in an element.
The formula to calculate the number of neutrons is given as:
In the given isotope
Substitute the values in the above formula to calculate the number of neutrons.
Similarly, calculate the number of neutrons in the given isotope
In
Substitute the values in the above formula to calculate the number of neutrons.
The number of neutrons in
(c)
Interpretation : The number of protons, neutrons,and electrons present in each pair of isotopes is to be calculated.
Concept Introduction : Isotopes are the elements having same atomic number but different mass numbers. An element can have two or more isotopes.
(c)

Answer to Problem 34LC
In
In
Explanation of Solution
The count of protons present in the nucleus of the atom gives the atomic number.
The count of protons and neutrons present in the nucleus of the atom gives the mass number.
The general representation symbol of an element is given as
Where,
The number of protons, number of electrons, and atomic number are always equal for a given element of the isotope.
So, for the given isotopes of Selenium, there are
The number of neutrons in an element is the difference between the mass number and the number of protons in an element.
The formula to calculate the number of neutrons is given as:
In the given isotope
Substitute the values in the above formula to calculate the number of neutrons.
Similarly, calculate the number of neutrons in the given isotope
In
Substitute the values in the above formula to calculate the number of neutrons.
The number of neutrons in
Chapter 4 Solutions
Chemistry 2012 Student Edition (hard Cover) Grade 11
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