What is the oxidation number of Oxygen?

How much energy moves onto the next level, in an energy pyramid

Ajet plane is speeding down the runway during takeoff. air resistance is not negligible. identify the forces on the jet.

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!