The Periodic Table: Organization & Trends Phenomena-Based Lesson: Gallium Metal Spontaneously Melting in the Palm of a Hand Presentation | Chemistry | Grades 9–12

This is the student-facing slide presentation that introduces the phenomenon, walks the class through observations and driving questions, and frames the evidence students will use for the Phenomena-Based Lesson in the high school Chemistry (grades 9–12) chapter The Periodic Table: Organization & Trends, built around the phenomenon Gallium Metal Spontaneously Melting in the Palm of a Hand. It is sold separately from the other two parts of the set.

Complete the set: The Periodic Table: Organization & Trends Phenomena-Based Lesson: Gallium Metal Spontaneously Melting in the Palm of a Hand Teacher Discussion Guide; The Periodic Table: Organization & Trends Phenomena-Based Lesson: Gallium Metal Spontaneously Melting in the Palm of a Hand Student Response Sheet. Scaffolded version: The Periodic Table: Organization & Trends Scaffolded Phenomena-Based Lesson: Gallium Metal Spontaneously Melting in the Palm of a Hand Presentation.

Sections: Section 1: Three-dimensional Learning Alignment (ngss); NGSS Dimension; Aligned Three-dimensional Learning Goal; Section 2: Anchoring Phenomenon & Driving Inquiry; Section 3: Productive Science Talk Moves Matrix; Talk Move Category; Verbatim Facilitation Prompt & Goal; Section 5: Student Misconceptions & Scientific Corrections. Sample item: “How does gallium's atomic radius and metallic crystal packing account for such an unusually low melting point?”

What's inside: Student Slide Show (editable .pptx + PDF, 22 slides).

Standards: HS-PS1-1 — Use 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. HS-PS1-2 — Construct and revise an explanation for the outcome of a simple chemical reaction based on the outermost electron states of atoms, trends in the periodic table, and knowledge of the patterns of chemical properties.

Resource type: Phenomena-Based Lesson – Presentation. Format: editable Microsoft PowerPoint file plus a ready-to-print PDF.

Classroom use: Open with the phenomenon slide show, let students record ideas on the response sheet, and lead the discussion with the teacher guide. Built for high school Chemistry, grades 9–12.

Format note: These files are delivered in Microsoft Office formats (Word and/or PowerPoint). If you open a worksheet that includes tables in Apple Pages or another non-Microsoft app, table formatting may not display correctly. For best results, use Microsoft Word or PowerPoint (or upload the file to Google Docs). If you run into any formatting issues, contact us and we can send a PDF version.