Which electrons are the valence electrons of the atom?

Visualize valence electrons. Valence electrons are the electrons in the outermost shell of an atom's electron cloud. The valence electrons are the single largest factor in how the atom will react chemically. read more

To find valence electrons using a period table, first see if your atom is a transitional metal, which are the elements in the middle rectangle of the table. If the atom is outside this block, locate its group number along the top of the table. The ones digit in the group number is the number of valence electrons. read more

Valence electrons are the outermost electrons which, therefore, are located on the highest energy levels. Consequently, these are the electrons available for chemical bonding. To determine the valence number, look at electron configurations which denote the number of electrons in the different energy levels and orbitals. read more