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Each Bromine Br atom contributes 4 valence electrons and the negative sign – provides an additional valence electron for a total of Be sure to put brackets and a – negative sign around the dot structure to show that Br3- is an ion with negative one charge.
Bromine is in group 7 or 17, so it has 7 valence electrons. We have 3 Bromines, and then we need to add in this negative up here, an additional valence electron, for a total of 22 valence electrons for the Br3- Lewis structure. We have three Bromines. We’ll line them up like this, and then we’ll take the electrons–we have and we’ll place two electrons between atoms to form chemical bonds.
Then we’ll go around the outside atoms to fill their octets. We have 2, 4, 6, 8, 16, and then back to the central Bromine, 18 and So everything has octets now, but we’ve only used We have an additional 2 valence electrons that we’re going to have to do something with. Because Bromine is below period 2 in the periodic table, that means it can have an expanded octet.
So we’ll put these last two valence electrons on the central Bromine. So we’ve now used all 22 valence electrons. We have octets on the outer Bromines. The inner Bromine has 10 valence electrons, but that’s OK because Bromine can have an expanded octet.
The last thing we need to do for the Br3- Lewis structure is put brackets around it to show that we have a negative ion. And there you have it: the Lewis structure for Br This is Dr.
Jul 26, 2013 · A step-by-step explanation of how to draw the Br3- Lewis Structure.In the Br3- Lewis structure Iodine (I) is the least electronegative and goes in the center…Author: Wayne Breslyn
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PBr 3 : Molar mass: 270.69 g/mol Appearance clear, colourless liquid Density: 2.852 g/cm 3: Melting point −41.5 °C (−42.7 °F; 231.7 K) Boiling point
Transcript: This is the Br3- Lewis structure. Bromine is in group 7 or 17, so it has 7 valence electrons. We have 3 Bromines, and then we need to add in this negative up here, an additional valence electron, for a total of 22 valence electrons for the Br3- Lewis structure.