Which New York State landscape region has surface bedrock mostly composed of metamorphic rock

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!

Which of the four hypothetical substances you investigated would be most harmful to living organisms? 50 points!

What is the volume of 2.5 moles of nitrogen gas (n2)at standard temperature and pressure (stp)?