Clarification Statement - S.HS.PS.1.2.CS:
Examples of chemical reactions could include the reaction of sodium and chlorine, of carbon and oxygen, or of carbon and hydrogen.

Assessment Boundary - S.HS.PS.1.2.AB:
Assessment is limited to chemical reactions involving main group elements and combustion reactions.

Science and Engineering Practices - 9-12.SEP6.2:
Construct and revise an explanation based on valid and reliable evidence obtained from a variety of sources (including students’ own investigations, models, theories, simulations, peer review) and the assumption that theories and laws that describe the na

Disciplinary Core Ideas - S.HS.PS.1.2.DCI:
PS1.A: Structure and Properties of Matter •The periodic table orders elements horizontally by the number of protons in the atom’s nucleus and places those with similar chemical properties in columns. The repeating patterns of this table reflect patterns of outer electron states. (Note: This Disciplinary Core Idea is also addressed by HS-PS1-1.) PS1.B: Chemical Reactions •The fact that atoms are conserved, together with knowledge of the chemical properties of the elements involved, can be used to describe and predict chemical reactions. •(NYSED)Oxidation-reduction reactions are the prevailing source of power for many of today’s modern conveniences.

Crosscutting Concepts - CC1.13:
Different patterns may be observed at each of the scales at which a system is studied and can provide evidence for causality in explanations of phenomena.