So, it’s failure to obey the octet rule doesn’t make chlorine dioxide bad, rare or useless… it’s a fairly common, important and useful chemical. Si Atomic Number: 14: Group: 14 (Carbon Family) Electron Configuration Ne3s 2 3p 2: Atomic Weight: 28.0855 g: Density: 2. Food and Drug Administration describes generation and application of this fairly common chemical in 21CFR173.300. It is eager to give up this electron in order to have a full outer energy level. As such, chlorine dioxide uses include industrial oxidants and disinfects for drinking water and food. A: An atom of a group 1 element such as sodium has just one valence electron. This unpaired electron accounts for the rather high reactivity of ClO 2. The odd electron count means that there must be an unpaired electron. Not all molecules obey the octet rule.Ĭhlorine dioxide is a bit special in not following the octet rule. The sum of the valence electrons is 5 (from N) + 6 (from O) 11. But it’s a real molecule, chlorine dioxide. Determine the total number of valence (outer shell) electrons. That doesn’t make sense in terms of the octet rule, as we’d get something along the lines of 7 + 2 = 9 when counting the chlorine valence electrons. The formula for chlorine dioxide is ClO 2, and it’s generally taken to mean the chlorine is bonded twice, instead of the usual once.
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