Particle Model of Pure Substances vs Mixtures

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Distinguish pure substances from heterogeneous and homogeneous mixtures using particle diagrams.

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Pure Substances, Mixtures, and the Periodic Table

7th Grade · Science · Open Global Science

7 lessons

Goal

Classify matter into elements, compounds, and mixtures, use chemical formulas, and apply periodic trends to predict reactivity.

7 lessons

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Separating Mixtures Using Physical PropertiesPremiumUp next
Identifying Elements by Their Proton NumberNot started yet
Using the Periodic Table to Identify Atoms in a FormulaNot started yet
Distinguishing Physical and Chemical ChangesNot started yet
Combining Elements to Form Diverse CompoundsNot started yet
Using Periodic Patterns to Predict Properties of Unknown ElementsNot started yet

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Learning standards covered

OGS.8.PS.2Open Global Science Standards 2026™ · 7th Grade

Differentiate between pure substances (elements and compounds) and mixtures (heterogeneous and homogeneous solutions), using chemical symbols, formulas, and particle diagrams, and analyze separation techniques based on physical properties.