Why completing an octet stabilises an atom, quantum mechanically?
11529
What is the quantum mechanical explanation of the octet rule?
70774
Why can't the Schrödinger equation be solved exactly for multi-electron atoms? Does some solution exist even in principle?
48114
Quantum mechanics - how can the energy be complex?
74797
Why are there $1 / 1.602176634 \times 10^{-19}$ electrons in a coulomb?
107304
How are qubits better than classical bit if they collapse to a classical state after measurement?
14810
Creation of entangled electrons
147491
When is separating the total wavefunction into a space part and a spin part possible?
58720
How to promote algebraic expressions to operators in quantum mechanics?
154772
The Momentum Operator in QM
90716
Conservation of energy and wavefunctions
55615
Can a single molecule have a state?
121389
Why is quantum mechancis is not content with symmetric operators, but wants self-adjoint operators?
52974
Why are the higher angular momentum states of a hydrogen atom closer to the nucleus?
73624
Why is orbital angular momentum quantized according to $I= \hbar \sqrt{\ell(\ell+1)}$?
112634
Why aren't orbitals symmetric?
58177
Why do lines in atomic spectra have thickness? (Bohr's Model)
37317
If you have a single atom in a box, what state of matter would it be in?