What element is used for shiny trim on cars

Write the symbol for every chemical element that has atomic number greater than 3 and atomic mass less than 12.0 u.

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.

The chart shows the bid provided by four contractors to complete a job. which contractor is the most cost-effective?