Which of the following is a simple definition of oxidation?
the loss of electrons
the gain of electrons
an agent that oxidizes something
an agent that reduces something

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!