So I want the total number of electrons … This makes chlorine's valence shell incomplete, and the atom attracts "loose" electrons to this shell to complete it, so the atom can be stable. On the right, the chloride ion has 18 electrons and has a 1− charge. On the left, the chlorine atom has 17 electrons. So I have, once again, the first energy level, the second energy level, and the third energy level. Octet rule has its limits and many exceptions, $\ce{ClF3}$ is a typical example of hypervalent molecules. B. We just add the valence electrons of each atoms involved. P has 5 valence electrons. Cl = 7 x 3. Cloride is a chlorine atom, which has found that last electron and added it to the outermost valence shell to become stable. An atom, which is the fundamental unit of an element, contains an equal number of electrons and protons. The atomic number of Cl is 17 and its simple electron arrangement is 2, 8, 7 …The region containing 7 electrons is called valence shell and remaining 10 electrons constitute core electrons…Thus Cl has core of Ne… 4 (Four) Nylon is a "big" covalent molecule used to make backpacks. The names for positive and negative ions are pronounced CAT-eye-ons and ANN-eye-ons, respectively. How many electrons do carbon and oxygen share? Each Cl has 7 valence electrons. If I want to figure out how many valence electrons chlorine has, I have to look for the electrons in the outermost shell, or the outermost energy level. Based on the periodic table the , the atomic number (Z) of chlorine is 17. $\begingroup$ "Every element wants 8 valence electrons" is just a simplified description for people to get started with chemistry. How many valence electrons does one chlorine (Cl) atom have? Each Cl has 3 lone pairs for a total of 12 lone pairs. This means that chlorine has 7 electrons in its valence shell of electrons. If I want to figure out how many valence electrons chlorine has, I have to look for the electrons in the outermost shell, or the outermost energy level. The four P-Cl bonds use 8 electrons. Which property of covalent compounds is most useful in making backpacks? C = 4. Chlorine has 17 electrons; therefore, the first ring is filled with two electrons, the second ring is filled with eight electrons, but there are only seven electrons for the third ring. The 7 electrons that are found in the valence shell are the electrons used to bond with the other atoms. H = 1----- 26 electrons. 7 (Seven) Which electron dot diagram shows the bonding between 2 chlorine atoms? Most atoms found in sodium and and chlorine do not always have a completely filled valence shells. 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