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.
Someone created an excel spreadsheet that was anonymously emailed to me. It contains confidential information. How can I check the file to see who created the file-therefore giving me a better idea of who is responsible for this.it is a .xlsx file.Update: I found who last modified it and who created it.omeone created an excel spreadsheet that was anonymously emailed to me. It contains confidential information. How can I check the file to see who created the file-therefore giving me a better idea of who is responsible for this. it is a .xlsx file. Add your answer. Source. Submit Cancel.