HS-PS1-1 Use the periodic table as a model to predict the relative properties of elements based on the patterns of electrons in the outermost energy level of atoms.
Clarification Statement: Examples of properties that could be predicted from patterns could include reactivity of metals, types of bonds formed, numbers of bonds formed, and reactions with oxygen.
Assessment Boundary: Assessment is limited to main group elements. Assessment does not include quantitative understanding of ionization energy beyond relative trends.
This resource appears to be designed to build towards this performance expectation, though the resource developer has not explicitly stated so.
Comments about Including the Performance Expectation
This activity gives students an opportunity to describe patterns of how relative properties of elements compare. To fully address the PE, students need to connect these patterns to the electron configurations of the atoms of each element. Along with graphing properties, students should also explore the “electron configurations” tab to examine the electron configurations by energy level and describe patterns in the configurations according to the periodic table. Students can then use observed patterns in the electron configurations to explain patterns in properties observed.
Students should also be asked to predict patterns in a group of elements (eg., Alkali Metals, Halogens, Noble Gases, etc.) using observed patterns from groups already examined. Predictions could be based off of data collected from the "Plot Data" or "Electron Configuration" tabs.
The properties students will investigate in this activity go beyond those listed in the clarification statement. Teachers should be sure to connect properties from this activity to additional chemical properties, like those included in the clarification statement.