What is the charge of pb in pb(so3)2

The molecular formula for caffeine is cshion402. which of the following elements is not found in caffeine?

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!

What occurs when a cell engulfs large food particals