Does $E=mc^2$ apply to electron shells with different energies?
104024
Does the mass of an electron change with its "energy state"?
108384
Special Relativity and $E = mc^2$
67701
The energy of an electromagnetic wave
122670
Explanation for $E~$ not falling off at $1/r^2$ for infinite line and sheet charges?
81178
Why are the two outer charge densities on a system of parallel charged plates identical?
17754
Intuitive Understanding of the constant "$e$"
74797
Why are there $1 / 1.602176634 \times 10^{-19}$ electrons in a coulomb?
27788
Why is the expected value $E(X^2) \neq E(X)^2$?
24540
Experimental boundaries for size of electron?
122376
Is Einstein's formula $E=mc^2$ the same as the kinetic energy formula $\dfrac{1}{2} mv^2$?
128619
Why does an electron shell further away from nucleus has higher energy level?
157534
Potential energy sign conventions
37399
The temperature of an electron
8760
Is the harmonic oscillator potential unique in having equally spaced discrete energy levels?
155484
Quantum mechanical picture of "electrons orbiting the nucleus"
59594
Binding energy and mass
135300
Energies and numbers of bound states in finite potential well