Clarification Statement - S.MS.PS.1.1.CS:
Emphasis is on developing models of molecules that vary in complexity. Examples of simple molecules could include ammonia and methanol. Examples of extended structures could include sodium chloride or diamonds. Examples of particulate-level models could

Assessment Boundary - S.MS.PS.1.1.AB:
Assessment does not include valence electrons and bonding energy, discussing the ionic nature of subunits of complex structures, or a complete depiction of all individual atoms in a complex molecule or extended structure.

Science and Engineering Practices - 6-8.SEP2.1:
Develop a model to predict and/or describe phenomena.

Disciplinary Core Ideas - S.MS.PS.1.1.DCI:
PS1.A: Structure and Properties of Matter •(NYSED) Substances are made of one type of atom or combinations of different types of atoms. Individual atoms are particles and can combine to form larger particles that range in size from two to thousands of atoms. •Solids may be formed from molecules, or they may be extended structures with repeating subunits (e.g., crystals).

Crosscutting Concepts - CC1.9:
Macroscopic patterns are related to the nature of microscopic and atomic-level structure.

Crosscutting Concepts - CC1.10:
Graphs, charts, and images can be used to identify patterns in data.

Crosscutting Concepts - CC7.4:
Time, space, and energy phenomena can be observed at various scales using models to study systems that are too large or too small.