2 H 2 O 2 ⟶ 2 H 2 O + O 2 If you collect 4.64 mL of O 2 at 298 K and 1.00 atm over 60.0 seconds from a reaction solution of 4.90 mL, what is the initial rate of the reaction?

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!