Between acetic acid and sulphuric acid, which of their structure is more stable

(Sulphuric acid) It donates its proton more easily. Hence, a stronger acid is one that dissociates more quickly that another acid.

Sulphuric acid It's donates its proton more easily hence a stronger acid is one that dissociates more quickly that another acid.

the number of valence electrons for each molecule or ion is shown beneath the structure. remember hydrogen will not have more than two electrons. this hydrogen is part of a covalent bond (sharing two electrons). a double bond here would cause hydrogen to share four electrons with phosphorus.

that's what i got you can count the number of atoms