Amongst the following, the total number of species NOT having eight electrons around central atom in its outer most shell, is \( \text{NH}_3, \text{AlCl}_3, \text{BeCl}_2, \text{CCl}_4, \text{PCl}_5 \):

Electron counts around central atoms: \( \text{NH}_3 \) (8), \( \text{AlCl}_3 \) (6), \( \text{BeCl}_2 \) (4), \( \text{CCl}_4 \) (8), \( \text{PCl}_5 \) (10). Thus, \( \text{AlCl}_3, \text{BeCl}_2, \text{PCl}_5 \) do not have 8 electrons, totaling 3 species. Wait, \( \text{NH}_3 \) has 8, \( \text{CCl}_4 \) has 8. Non-octet species are \( \text{AlCl}_3, \text{BeCl}_2, \text{PCl}_5 \) (3 species).