First Introduction to Molecular Models

SCIENTIFIC CONCEPTS/PROCESSES

• Understand electron characteristics and then atoms
• Introduction to 2 and 3 dimensional molecular models
• Understand Lewis diagramming
• Construct molecular structures
• Write empirical and structural formulas

Four-page student worksheets introduce students to molecular models by first using 2-dimensional color-coded atoms. Lewis diagramming can be taught with these models (directions included in Instruction Manual).

The next activity deals with the 3-dimensional structure of the atom. Similarities in molecules are readily observed as students connect atoms to similar atoms, such as forming hydrocarbons. Bonding is illustrated in constructing molecules with different atoms. Understanding the differences in empirical and structural formulas is emphasized. Students then progress to 3-dimensional color-coded plastic atoms, building more realistic molecular models. The 2-dimensional and 3-dimensional atoms are colorful, easy-to-assemble and help students visualize the structure of the molecular formula that it represents.

An excellent activity for all grade levels, it can be used for review as well as an introduction to atom-molecule concepts. 12 complete sets of molecular model components are provided.

Contents List

• 1 Teachers Guide
• 36 Student Worksheets and Guides, Part I and Part II
• 1 Detailed Instructions with full background information
• 12 3-dimensional plastic atoms, color-coded
• 12 2-dimensional atoms, die-cut, color-coded
• 20 Covalent plastic bonds

Centers:

• 4 Carbon tetrahedral centers (black)
• 1 Nitrogen tetrahedral center (red)

Electron Atoms

• 1 Chlorine single electron atom (green)
• 1 Fluorine single electron atom (pale green)
• 1 Oxygen double electron bond (blue)
• 18 Hydrogen single electron atoms (white)

Atoms

• 1 Aluminum (pink)
• 2 Carbon (black)
• 4 Chlorine (green)
• 1 Fluorine (pale green)
• 8 Hydrogen (white)
• 1 Nitrogen (red)
• 1 Oxygen (blue)
• 1 Sodium (grey)
• 1 Sulfur (yellow)

Measurements are approximate.