Based on its location on the periodic table, which metal is likely to be less reactive than rubidium and more reactive than calcium

How would the number of moles (n) of o2 change if the atmospheric pressure doubled but all other variables stayed the same

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!

Which statement best describes the he properties of iconic compounds ?