Why atom has the straight discrete energy levels?
60471
Electron shells in atoms: What causes them to exist as they do?
120796
Why is the mol a fundamental physical quantity?
141376
Why the dipole interaction term in the Hamiltonian has all diagonal elements to be zero in the energy eigenbasis?
591
Reason for the discreteness arising in quantum mechanics?
137837
Why electrons can't radiate in their atoms' orbits?
101483
How does the electron jump across "gaps" in its orbital?
135300
Energies and numbers of bound states in finite potential well
14989
In quantum mechanics, given certain energy spectrum can one generate the corresponding potential?
33512
What's the difference between the atomic and nonatomic attributes?
1048
Discreteness of set of energy eigenvalues
101501
Why is the nucleus so small and why is the atom 99.999% empty space?
148864
The concept of Fermi level
122561
Is the energy always discrete?
11529
What is the quantum mechanical explanation of the octet rule?
37317
If you have a single atom in a box, what state of matter would it be in?
82218
Do we really not know why atoms 'decide' to produce a photon?
131369
Number of Orbitals - Hydrogen Orbital just one, but why can we plot also higher states e.g. SPDF orbits?