What color of light is being emitted when the electron drops from n= 6 to n=2 as shown

in the scenario? explain your reasoning, based on what you know about the change in

energy level, and the relationship between energy and wavelength of light, and the

relationship between the color and wavelength of light.

This active feature of earth's crust in building mountain ranges as well as islands. this feature is a a) cavern. b) earthquake. c) mountain. d) volcano.

Significant figures are digits read directly from the measuring instrument plus one more digit, which is __ by the observer.

Americium-241 undergoes fission to produce three neutrons per fission event. if a neutron-absorbing material is mixed in with this sample so that the rate of neutron production drops down to 1.8 neutrons per fission event, which will be effective at achieving a critical mass? check all that apply. remove a deflective shield surrounding the sample. remove absorbent material mixed in with the sample. compress the sample of americium-241.