Chapter 39, Problem 1Q

To determine

The difference between Bohr’s view and the quantum-mechanical view of the atom.

Answer to Problem 1Q

The difference between Bohr’s view and the quantum-mechanical view of the atom is as tabulated below.

Explanation of Solution

The differences between Bohr’s view of the atom and the quantum-mechanical view of the atom is as tabulated below,

Bohr’s view of the atom	Quantum-mechanical view of the atom
In Bohr’s model, the electrons were placed in definite circular orbits of an atom.	The quantum-mechanical model uses the concept of electron “probability clouds,” to explain an atom.
To describe the electron in Bohr’s model, a single quantum number is used and denoted by $n$.	To describe the electron in quantum model, four quantum numbers were used which were $n$ $l$ $m_{\text{l}}$ and $m_{\text{s}}$.
The Bohr’s model failed to explain that the spectra of atoms are more complex than hydrogen atom and was not able to explain the fine structure in the spectra	In quantum model, wave function is used to determine the probability of finding the electron at a given position in the atom and Quantum-mechanical model successfully explains the spectra of more complex atoms and fine structure in its view of the atom.

Conclusion:

Therefore, the difference between Bohr’s view and the quantum-mechanical view of the atom is as tabulated above.