Definition of IGM. 1. : a class of immunoglobulins of high molecular weight including the primary antibodies that are released into the blood early in the immune response to be replaced later by IgG and that are highly efficient in binding complement.2.: an antibody of the class IgM.ADVERTISEMENT.efinition of IGM. 1. : a class of immunoglobulins of high molecular weight including the primary antibodies that are released into the blood early in the immune response to be replaced later by IgG and that are highly efficient in binding complement. 2. : an antibody of the class IgM. ADVERTISEMENT.
Calcium hydroxide is an Arrhenius base. You can see that it consists of a cation (we know calcium should be a cation because it is a metal on the left side of the periodic table bonded to elements on the right side). The anions are hydroxyl groups. #Ca(OH)_2->Ca^(2+)+2OH^-#.
This is the first acid/base concept to be developed to describe typical acid/base reactions. E.g. Arrhenius Acid- HCl (acid), Arrhenius Base-NaOH (base). 10.2 Bronsted-Lowry Acid-Base Theory BrÃ¸nsted (Denmark) and Lowry (England) came up with an alternative acids and base bases definition to Arrhenius. There solved the problems associated with non