An atom, which is the fundamental unit of an element, contains an equal number of electrons and protons. 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. 7 (Seven) Which electron dot diagram shows the bonding between 2 chlorine atoms? The four P-Cl bonds use 8 electrons. Each Cl has 3 lone pairs for a total of 12 lone pairs. P has 5 valence electrons. This means that chlorine has 7 electrons in its valence shell of electrons. On the left, the chlorine atom has 17 electrons. Each Cl has 7 valence electrons. 4 (Four) Nylon is a "big" covalent molecule used to make backpacks. 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. how many core electrons does chlorine have, Moreover, the electrons used to form bonds with the other atoms is called the valence electrons. Based on the periodic table the , the atomic number (Z) of chlorine is 17. Chlorine is an element that belongs to Group7A in the periodic table. 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. How many electrons do carbon and oxygen share? So I want the total number of electrons … How many valence electrons does one chlorine (Cl) atom have? 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. That's a total of 33 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. We just add the valence electrons of each atoms involved. C = 4. Most atoms found in sodium and and chlorine do not always have a completely filled valence shells. The chemical element chlorine has 17 electrons, 17 protons and 18 neutrons. Octet rule has its limits and many exceptions, $\ce{ClF3}$ is a typical example of hypervalent molecules. B. So I have, once again, the first energy level, the second energy level, and the third energy level. 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. On the right, the chloride ion has 18 electrons and has a 1− charge. 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