
Interpretation:
The unknown atom, X, is to be identified in the given nuclear reactions.
Concept Introduction:
In a balanced radioactive decay:
In a balanced radioactive decay, the subscript on the individual particles represents the

Answer to Problem 5QP
Solution:
(a)The term X is
The term X is
The term X is
The term X is
The term X is
Explanation of Solution
a)
The atomic mass and atomic number of
Now, apply the balancing rules as follows:
And
On the left side of the reaction, the sum of atomic numbers is calculated as follows:
On the right side of the reaction, the sum of atomic numbers is
Thus, the atomic number of X is as follows:
On the left side of the reaction, the sum of mass numbers is as follows:
On the right side of the reaction, the sum of mass numbers is
Thus, the mass number of X is as follows:
So, X will be
b)
Now, apply the balancing rules as follows:
And
On the left side of the reaction, the sum of atomic numbers is calculated as follows:
On the right side of the reaction, the sum of atomic numbers is
Thus, the atomic number of X is calculated as follows:
Similarly,
On the left side of the reaction, the sum of mass numbers is calculated as follows:
On the right side of the reaction, the sum of mass numbers is
Thus, the mass number of X is calculated as follows:
So, X will be
c)
Now, apply the balancing rules as follows:
And
On the left side of the reaction, the sum of atomic numbers is as follows:
On the right side of the reaction, the sum of atomic numbers is
Thus, the atomic number of X is calculated as follows:
Similarly,
On the left side of the reaction, the sum of mass numbers is calculated as follows:
On the right side of the reaction, the sum of mass numbers is
Thus, the mass number of X is calculated as follows:
So, X will be
d)
Now, apply the balancing rules as follows:
And
On the left side of the reaction, the sum of atomic numbers is calculated as follows:
On the right side of the reaction, the sum of atomic numbers is
Thus, the atomic number of X is as follows:
Similarly,
On the left side of the reaction, the sum of mass numbers is calculated as follows:
On the right side of the reaction, the sum of mass numbers is
Thus, the mass number of X is as follows:
So, X will be
e)
Now, apply the balancing rules as:
And
On the left side of the reaction, the sum of atomic numbers is
On the right side of the reaction, the sum of atomic numbers is
Thus, atomic number of X is calculated as follows:
Similarly,
On the left side of the reaction, the sum of mass numbers is
On the right side of the reaction, the sum of mass numbers is
Thus, the mass number of X is as follows:
So, X will be
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Chapter 20 Solutions
Chemistry
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