How many electrons will be on the second shell

i guess that visual aids present persuasive examples to what you are presenting, some factors would be theme (does it fit with the color, information, what you are presenting), size (can you see it, is it a big enough span of data/information), and overall look of the visual aid.

hope this : )

i dont know but

explanation:

whoever your teacher is, deserves a raise for using pokemon as an example

at right angles to each other