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.
ROBLOX was started by David Baszucki and Erick Cassel in 2005 at Silicon Valley, California. It was believed that ROBLOX started out as a concept in 1999, but was not created due to the unavailable technology at the time. The name ROBLOX is a portmanteau of âRobotâ and âBlocksâ. The first ever game level to be created was Crossroads, a 2,000 block large playground-like area, where players can fight each other in what is known as a âbrick battleâ.