What kind of intermolecular forces act between an oxygen molecule and a neon atom?

The arrangement of particles is most ordered in a sample of

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!

If i had 2 m naoh solution, what does the 2 m stand for? 2 molar, but 2 of a solute in 1