An Allegory is used to tell a story that has characters, a setting, as well as other types of symbols, that have both literal and figurative meanings.
Chlorine is counted among this group along with hydrogen (H 2), iodine (I 2), bromine (Br 2), oxygen (O 2), nitrogen (N 2) and fluorine (Fl 2). With seven electrons in its outermost orbit--one electron short of a stable eight-- the element chlorine exists in nature as a diatomic molecule. This arrangement allows two chlorine atoms to share their outermost orbit electrons, achieving stability, compared to the single atom.
1 In the Lewis structure for PCl 4 - there are a total of 34 valence electrons. 2  Four pairs will be used in the chemical bonds between the P and F. 3  There is an extra pair of electrons left over after forming bonds and completing the octets for the chlorine atoms. 4  These should be placed on the central atom (P).