How do you determine the number of valence electrons in an atom

- How do you determine the number of valence electrons in an atom’s valence shell
- How do you determine the number of valence electrons in an atom using the periodic table
- How do you determine the number of valence electrons in an atom of a representative element
- How do you determine the number of valence electrons in an atom of an element
- How do you determine the number of valence electrons in an atom of a certain element