An acid is a substance that increases the concentration of H₃O⁺ ions in solution. Look at the reaction below of phenol (C₆H₅OH) with water:
Which reactant acts as an acid by contributing a H⁺ ion to create H₃O⁺ in the chemical equation?
a. C₆H₅OH(aq)
b. H₂O(l)
c. C₆H₅O⁻(aq)
d. H₃O⁺(aq)

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!