the table shows the melting and boiling points for four substances. In which are the particles in an ordered arrangement at room temperature?

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!

How many peaks will be present in a mass spectrum for brcl?

Maya wrote if you step to describe how carbon circulates between the atmosphere and living organisms