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.
IBM Is Founded. The Computing-Tabulating-Recording Company, the precursor to IBM, was founded on June 16, 1911. At its beginning, it was a merger of three manufacturing businesses, a product of the times orchestrated by the financier, Charles Flint.he Computing-Tabulating-Recording Company, the precursor to IBM, was founded on June 16, 1911. At its beginning, it was a merger of three manufacturing businesses, a product of the times orchestrated by the financier, Charles Flint.