What is a community that has reached a stable stage of ecological succession called

When svante arrhenius first proposed his acid-base theory, he was a doctoral candidate. his professors thought his ideas were unfounded. within a decade, the arrhenius theory of acid-base was widely accepted and praised within the scientific world. arrhenius defined acids as compounds having ionizable hydrogen and bases as compounds with ionizable a) barium. b) hydronium. c) hydroxide. d) oxygen.

An observation that requires measurement is called quantitative observable or qualitative

How do you identify the anode on a power source such as a battery? how do you identify the cathode? how are terms anion and cation?