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.
About Ambition. Ambition was founded in 1999 with a belief that whilst we didn't want to reinvent the wheel, we did feel that there was a tremendous opportunity to carve a niche of our own in the recruitment market and build a special organisation.bout Ambition. Ambition was founded in 1999 with a belief that whilst we didn't want to reinvent the wheel, we did feel that there was a tremendous opportunity to carve a niche of our own in the recruitment market and build a special organisation.