(01.01 LC) Which of the following best describes gravitational force?
An attraction between two objects that have mass
An attraction between two objects due to their electrons
The force that keeps atoms and molecules bound together
The force that keeps objects from moving when they are at rest

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!