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.
The beginning of AppleWhen twenty-one-year-old Jobs saw a computer that Wozniak had designed for his own use, he convinced Wozniak to assist him and started a company to market the computer. Apple Computer Co. was founded as a partnership on April 1, 1976.pple Computer was founded in Los Altos, California on April 1, 1976 by Steve Jobs, Steve Wozniak and Ronald Wayne. They sold the Apple I personal computer kit at $666.66.