Using the periodic table, classify each of the following elements as a metal or a nonmetal, and then further classify each as a main-group (representative) element, transition metal, or inner transition metal: cobalt europium iodine indium lithium oxygen cadmium terbium rhenium

a. Classify the following elements as metals or nonmetals: Mg Si Rn Ti Ge Rn Au B Am Bi At Br b. The distinction between metals and nonmetals is really not a clear one. Some elements, called metalloids, are intermediate in their properties. Which of these elements would you reclassify as metalloids? What other elements in the periodic table would you expect to be metalloids?

Write the simplest formula for each of the following substances, listing the elements in the order given. a molecule containing one carbon atom and two oxygen atoms a compound containing one aluminum atom for every three chlorine atoms per chloric acid, which contains one hydrogen atom, one chlorine atom, and four oxygen atoms a molecule containing one sulfur atom and six chlorine atoms