There are a total of 18 electrons in the P block. The P block is the area of the periodic table that includes the elements in groups 13-18. These groups are also known as the triels, tetrels, pentels, hexels, septels, and noble gases. The P block elements are characterized by having their outermost electrons in the p orbital. The number of electrons in the P block is determined by the number of elements in each group and the number of electrons in the p orbitals of each element. For example, group 13 elements have three electrons in their p orbitals, while group 18 elements have six electrons in their p orbitals.