Which principal energy level change by the electron of a hydrogen atom will cause the greatest amount of energy to be absorbed

for the points

hello there the answer is d

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what do the different brain waves do?

explanation:

brainwaves are produced by synchronised electrical pulses from masses of neurons communicating with each other. brainwaves are detected using sensors placed on the scalp. brainwave speed is measured in hertz (cycles per second) and they are divided into bands delineating slow, moderate, and fast waves.

i believe your answer would be c.. : )