A control variable is one in which . Group of answer choices

there is a change in the independent variable

there are more than 3 dependent variables

no changes take placeusual or common conditions

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!