I had a multiple choice question that asked: which one of the following chemical equations best represents the ionsation of the ethanoate ion CH3COO- I wrote the answer as the eth …

Is the ionisation of acids in water, or even bases in water, endothermic or exothermic? eg. Is HCl + H2O ---> H3O+ + Cl- exothermic? Thanks

I read that "the ionisation energies of electrons in an atom decrease as the shell number decreases" but first I thought "orbital energies increase as you go up the shells". Aren' …