Concept explainers
The reason why the molecule is not stable, but the ion is
Answer to Problem 4Q
Solution:
The correct answer is ‘to obey Pauli Exclusion Principle’.
Explanation of Solution
Given:
The molecule is not stable but the ion is.
Formula used:
• No two electrons (or any other fermions)of an atom or molecule, can have all the same electronic quantum numbers .
Calculation:
As we know that hydrogen atom has only one S-orbital and in each S-orbital a maximum of 2 electrons can be accommodated.
Now, the atomic number of hydrogen atom can share its electron with other hydrogen atom to form a covalent bond.
In this way the electronic quantum numbers of such two atoms will have the same value for n, l, and , while will be for one atom and for other atom.
Now, if we consider a third hydrogen atom that will have all n, l, and to be the same as that of any of previous two atoms; it is not possible according to the Pauli Exclusion Principle.
When we consider ion, the electron of one atom is removed. So, now it does not over-rule the Pauli Exclusion Principle. Thus it is found to be stable.
Chapter 29 Solutions
Physics: Principles with Applications
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