How could you identify that two elements have formed an ionic bond? A. if the elements share valence electrons with each other in the valence shell, forming a cation and anion
B. if one element has transferred valence electrons to another element’s valence shell, forming a cation and anion
C. if both of the elements involved are nonmetals that will form anions through the sharing of valence electrons
D. if both of the elements involved are metals that will form cations through the transfer of valence electrons

b. is the answer hoped i        

chemical changes occur when a substance combines with another to form a new substance, called chemical synthesis or, alternatively, chemical decomposition into two or more different substances. these processes are called chemical reactions and, in general, are not reversible except by further chemical reactions. some reactions produce heat and are called exothermic reactions and others may require heat to enable the reaction to occur, which are called endothermic reactions. understanding chemical changes is a major part of the science of chemistry.