How do You Find Valence Electrons?

Valence electrons are the electrons in the outer most shell of the atom. The periodic table is arrange such that the columns represent the number of valence electrons. Column 1 and 2 elements have 1 and 2 valence electrons respectively. Columns 13 through 18 have 3 through 8 valence electrons respectively. The transitional metals, columns 3 through 12 don’t follow this exactly you need to use the d electron count method.