Chemistry help relating to atoms and noble gas notation!?

Chemistry help relating to atoms and noble gas notation!?

I'm really busy so I need help as soon as possible on the following:

1. Need logical specific steps ( as precise as possible please) on how to do noble gas notation. I understand part of it. For example, to give the noble gas notation of Se the extent I got in trying to get to the answer is [ ] (in the braces you are supposed to put something, not sure what that it) and than I think you are supposed to put 4p5 ( the highest name of an energy level). What you are supposed to put in the braces Im not sure of.

Also to find the out if a specific kind of light named on the electromagnetic spectrum (ex. infared, microwaves) is faster than infared light is faster how would you calculate that?

I was guessing the anwer could be one of the following: The speed of any light is the same because the speed of light is constant in the equation: c=lameda multiplied by v, or c is not constant and you would find that depending on the v mathematically.

Help on the question " Describe an orbital in terms of an electron cloud."

Educated guesses would be helpful too, or any guess that pertains to the question. If you are answering and this is the case, just write that you are not sure. Of course definite answers are better though.