A laser produces a wavelength of 523 nm in pulses whose duration is 3.0X 10-9 s. If the laser produces 0.376 J of energy per pulse, b)Calculate the energy if the pulse it extended to 0.05 seconds.

I'm learning about the periodic tables and what each subject's configuration is. for example, hydrogen is 1s^1, but i don't understand how you get that. can someone me understand how to figure out how to figure this out? sorry if the question makes no sense, but it would really a lot if you could me understand! you so much if you can!