Valence Electrons and Ions Practice You will need a Periodic Table for these practice questions. 1. What is the symbol of a radium ion? Question 1 of 12 Loading… 2. What is the symbol of a strontium ion? Question 2 of 12 Loading… 3. What is the symbol of a bromine ion? Question 3 of 12 Loading… 4. What is the symbol for a rubidium ion? Question 4 of 12 Loading… 5. How many occupied electron shells does tin have? 1 5 7 6 3Question 5 of 12 Loading… 6. How many occupied electron shells does rubidium have? 4 6 7 5 2Question 6 of 12 Loading… 7. How many occupied electron shells does lithium have? 1 4 2 6 3Question 7 of 12 Loading… 8. How many occupied electron shells does carbon have? 4 5 6 2 3Question 8 of 12 Loading… 9. How many valence electrons does a neutral atom of carbon have? 8 3 1 6 4Question 9 of 12 Loading… 10. How many valence electrons does a neutral atom of phosphorus have? 3 8 4 2 5Question 10 of 12 Loading… 11. How many valence electrons does a neutral atom of argon have? 6 4 3 8 2Question 11 of 12 Loading… 12. How many valence electrons does a neutral atom of hydrogen have? 4 3 1 7 2Question 12 of 12 Loading… Loading…