Washington DC Standards
DC.8.2. Structure of Matter: Broad Concept: Elements have distinct macroscopic properties and atomic structures. As a basis for understanding this concept, students:
8.2.4. Diagram and describe how atoms may combine (bond) into molecules or into large crystalline arrays.
DC.CC.6-8.RST. Reading Standards for Literacy in Science and Technical Subjects
Craft and Structure
6-8.RST.4. Determine the meaning of symbols, key terms, and other domain-specific words and phrases as they are used in a specific scientific or technical context relevant to grades 6-8 texts and topics.