Which chemical species can form an ionic bond with an anion?
Hg22+
NO2–
SO32–
Ar

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 does nathan’s hypothesis lead to new investigations

How to make a periodic table out of candy