Standard 2b Preknowledge
2b) Students know how to use the periodic table to identify metals,semimetals, nonmetals, and halogens.
CALIFORNIA FRAMEWORKS SUMMARY: Most periodic tables have a heavy stepped line running from boron to astatine. Elements to the immediate right and left of this line, excluding the metal aluminum, are semimetals and have properties that are intermediate between metals and nonmetals. Elements further to the left are metals. Those further to the right are nonmetals. Halogens, which are a well-known family of nonmetals, are found in Group 17 (formerly referred to as Group VIIA). A group, also sometimes called a “family,” is found in a vertical column in the periodic table.