How many atoms are equal to 1.5 moles of helium

Why do sodium and neon have vastly different chemical and physical properties despite having similar atomic masses?

In the following redox reaction which is the oxidizing agent and which is the reducing agent? alcl3 + na nacl + al

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.