The Milky Way Galaxy is one of
in the known universe.
OA) hundreds
OB thousands
C) millions
D) billions

Which of these best describes an ionic bond?

What human activity increases beach erosion?

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!