Read the list of elements given below. he, ne, ar, kr which of the following about the elements is true? all of them are unreactive gases. all of them are reactive metalloids. he and ne are unreactive gases and ar and kr reactive metalloids. he and ne are reactive metalloids and ar and kr unreactive gases.

Which is a character of nuclear fusion but not nuclear fission

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.

Calculate the molar mass of aluminum oxide (al2o3). express your answer to four significant figures.