5.64 Place the elements in each set in order of decreasing atomic size. a. CI, S,P4
c. Ba, Ca, Sr
b. Ge, Si, C
d. S, O, Se

How heavy is thanos? a) 3000 lbs b) all of it c) the price of tea in china d) heavy enough

How do you know when a chemical reaction has occurred

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!