sentence2_structure: Elements on the periodic table of the elements<>are classified<>into categories such as metals and nonmetals
sentence1: Be able to classify an element as a metal, nonmetal or semimetal based on experimental observations of physical and chemical properties.
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