How to find amount of valence electrons on periodic table

- How to find of valence electrons on periodic table
- How to find number of valence electrons on periodic table
- How to find number of valence electrons based on periodic table
- How do you find the amount of valence electrons on the periodic table
- How to find number of valence electrons without periodic table
- How to find the number of valence electrons
- How to find number of valence electrons from electron configuration