What is the significance of the Schrödinger wave equation to the quantum mechanical model of the atom?

Quantum Mechanical Model of Atom

The solution of the wave equation brings the idea of shells, sub-shells and orbitals. The probability of finding an electron at a point within an atom is proportional to the |ψ|2 at that point, where ψ represents the wave-function of that electron.

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The second law of thermodynamics says that processes that involve the transfer or conversation of heat energy are irreversible. The second law also states that there is a natural tendency of any isolated system to degenerate into a more disordered state. One thing the second law explains is that it is impossible to convert hear energy to mechanical energy with 100 percent efficiency.