Formulas for Ionic Compounds

To help remind students of what we were studying prior to the Friday mini-quiz, we began class with the entry task question: What elements will combine with strontium, Sr, in a 1:1 ratio? Explain your thinking.

We then reviewed select problems from the back of the Lesson 20 worksheet before moving on to the process of creating and naming ionic compounds through the game Salty Eights.  Working in groups of four, students used the game pieces to play the game, recording the compound names and formulas  on the Lesson 21 Worksheet.

For additional support writing ionic formulas, students are encouraged to watch the video below:

Homework for this evening:

  • Read Lesson 21 in the textbook.  Login via and enter your username and password:
    • Username: wahps****s-####### (**** = first 4 letters of your last name and ####### = student number).  Remember to include the dash between s and #.
    • Password: S-####### (the S must be capitalized)
  • Work through the homework problems at the end of Lesson 21 and then verify accuracy with the Lesson 21 Homework Answers.
  • Write notes for Lesson 21 on the Chapter 4 Notes handout.
  • Come to class tomorrow prepared to ask questions about anything from Lesson 21 you do not yet fully understand.

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