Performance expectationUse 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.
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 is limited to main group elements. Assessment does not include quantitative understanding of ionization energy beyond relative trends.
Every item written to HS-PS1-1 has to assess all three dimensions together, not the content alone. This is the structural change that made older practice material stop matching the exam.
Developing and Using Models
What a student at each level can do with HS-PS1-1. These drive how a cluster spreads difficulty across its items.
Summarised by ScienceIQ from the NYSED Performance Level Descriptions for Physical Science: Chemistry. These are our wording, not the Department’s — the official descriptions are the authority.
Identify periodic patterns or relative properties within a group or period.
Identify valence-electron patterns and relative properties in groups or periods.
Use the periodic table as a model to describe relative element properties.
Use the periodic table as a model to predict relative element properties.
Phenomenon stimulus, connected items across the required types, answer key, rubric and figures drawn deterministically from a structured spec — in the format your students will sit.