Lewis Acid-Base Concept. The Lewis theory classifies a substance as an acid if it acts as an electron-pair acceptor and as a base if it acts as an electron-pair donor. Other ways of classifying substances as acids or bases are the Arrhenius concept and the Bronsted-Lowry concept.ewis Acid-Base Concept. The Lewis theory classifies a substance as an acid if it acts as an electron-pair acceptor and as a base if it acts as an electron-pair donor. Other ways of classifying substances as acids or bases are the Arrhenius concept and the Bronsted-Lowry concept.
Microsoft Excel was created by Microsoft Corporation. It was first released in 1985.
When did Microsoft PowerPoint first come out and how has it evolved since? Answer Wiki. PowerPoint is more than 25 years old, and was created by a team that included Robert Gaskins, who is widely acknowledged as the founder of the program. Gaskins was at that time part of a company called Forethought that was thereafter acquired by Microsoft.