lewis acid vs base

[bellaha4F]

is the lewis acid and base valid for every single compound? or is it just some compounds that have a lewis acid and base?

[HanaAwad_4B]

Only some compounds have Lewis Acids and Bases. Usually elements like Boron, Aluminum etc. are lewis acids because they don't follow the octet rule and only have 6 electrons in total (opposed to 8). When this happens, another element will donate two of their electrons to the bond instead of just one, forming a coordinate covalent bond.

[Chetas Holagunda 3H]

Adding on, the base if the one giving the lone pair while the acid is the one accepting the lone pair.