An electron in the hydrogen atom makes a transition from an energy state of principal quantum number ni to the n = 2 state. if the photon emitted has a wavelength of 657 nm, what is the value of ni?

There is a single path for electrons. the current decreases when additional resistors are added. the current will be the same in each resistor. these statements best describe a(n) circuit.

What are the first two quantum numbers for the electrons located in subshell 4d? what are the first three quantum numbers for the electrons located in subshell 2s? how many electrons can be held in a sublevel l = 3? how many electrons can be held in the energy level n = 4? how many electrons in an atom can share the quantum numbers n = 4 and l = 3?

Imagine that you push on a large rock. at what point does your effort change the rock’s mechanical energy?