What is an organelle (A)Organelles are only common to prokaryotic cells
(B)An organelle is made up of different tissues working together
(C)An organelle is structure in a cell that performs a specific task

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!