A student is given a small sample of a pure solid substance. She is asked to identify the substance based on a particular property. Which property, if determined accurately, would best help her identify the substance?

If two atoms are bonded to a central atom with no lone pairs,how will they be arranged

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 moles of kci are produced from 2.50 moles k