You observe a x-ray line with a wavelength of 0.144 nm.
a. what is the energy of the x-ray photon, in ev?
b. determine which element (name and atomic number) produced the line.
c. if the element found in part (b) was modeled as a bohr atom (that is, with only one electron but the same atomic number), what
would be the energy of the transition of the transition from the n=2 to n=1 state? how does this value compare with your value in
part (a)?

unlike poles attract

where’s the list ? the question is incomplete

  distance on the y-axis and time on the x-axis.

explanation:

the instantaneous velocity = change in position/time taken

the slope of the graph should give instantaneous velocity.

  slope of a graph = change in value of y -axis / change in values of x -axis

  comparing both the equations

    change in value of y -axis = change in position

  change in values of x -axis = time taken

so position values should be on the y axis and time values should be on the x axis.

distance on the y-axis and time on the x-axis.

k2s for potassium sulphide