How does the number of valence electrons affect reactivity

- How does the number of valence electrons affect an element's reactivity
- How does the number of valence electrons affect the reactivity of an atom
- How does the number of valence electrons in a metal affect its reactivity
- How does the number of valence electrons affect the reactivity of elements across the periodic table
- How does the number of valence electrons in an atom affect its chemical reactivity
- How to find the number of valence electrons
- How to find number of valence electrons from electron configuration