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Naming and Writing Formulas

Students become further acquainted with rules and conventions associated with saying the names and writing the names of various compounds. In particular, naming conventions are introduced for several of the most frequently encountered polyatomic ions. Alas, in this instance the names of common polyatomic ions must be memorized. Common names for polyatomic ions are used in much the same way as a single element. As an example, sodium sulfate (Na2SO4) combines the names of sodium (Na, an element) with sulfate (SO4, an ion). Polyatomic ions are charged entities composed of several atoms bound together. Common polyatomic ions (such as sulfate) have special names which students must memorize.


Lesson 1 (or “Day 1”) Material
Lesson 2 (or “Day 2”) Material
Lesson 3 (or “Day 3”) Material
Lesson 4 (or “Day 4”) Material

2:24 Monoatomic and Polyatomic Ions

11:20 Writing Formulas with Polyatomic Ions

3:24 Naming Compounds Containing Polyatomic Ions


Compare Contrast and Debate

Kickoff Debate Background: xx

  • Position A: Honeycutt Science should x
  • Position B: Honeycutt Science should x

Resources Documents and Links

Notes and Notices

Instructor Emphasis:

  • Science & Engineering Practice: Plan and conduct investigations.
  • Cross-Cutting Concept: Patterns.