sentence2_structure: Elements on the periodic table of the elements<>are classified<>into categories such as metals and nonmetals
sentence1: Inorganic, Bioinorganic, and Organometallic Chemistry --Supports research on the synthesis, structure, and reaction mechanisms of molecules containing metals, metalloids, and  nonmetals encompassing the entire periodic table of the elements.
sentence2: Elements on the periodic table of the elements are classified into categories such as metals and nonmetals.
question: Elements on the Periodic Table of the Elements are classified into categories such as