I need somebody that is good at high school chemistry to be active at 12:15 pm est us time! I am gonna need help on this test please!!

The wave shown on the electromagnetic spectrum disturb the medium it passes through a)different frequency. b)the same frequency .

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!

Find the mass, in grams, of 5.00*10^23 molecules of f2