Draw the Lewis structure for NBr3 molecule. Draw the molecule by placing atoms on the canvas and connecting them with bonds. Include all lone pairs of electrons. ZE [] + C H O N S P F DOO Br CI I X @? More
The correct answer and explanation is:
To draw the Lewis structure for the NBr₃ (Nitrogen Tribromide) molecule, we need to follow these steps:
- Count the valence electrons:
- Nitrogen (N) is in Group 15, so it has 5 valence electrons.
- Bromine (Br) is in Group 17, so each bromine atom has 7 valence electrons. Since there are three bromine atoms, that gives 3 × 7 = 21 valence electrons from bromine.
- Total valence electrons = 5 (from N) + 21 (from Br) = 26 electrons.
- Determine the central atom:
- Nitrogen (N) will be the central atom since it is less electronegative than bromine (Br).
- Connect the atoms with single bonds:
- Place nitrogen (N) in the center and connect it with the three bromine (Br) atoms using single bonds. Each single bond consists of two electrons. So, 3 single bonds will use 6 electrons.
- Distribute the remaining electrons as lone pairs:
- After placing the bonds, we have 26 – 6 = 20 electrons remaining.
- Place 3 lone pairs of electrons (6 electrons) around each bromine atom. This accounts for 18 electrons.
- The remaining 2 electrons will be placed as a lone pair on nitrogen (N).
- Check for octet completion:
- Each bromine atom now has 8 electrons around it (2 from the bond and 6 from the lone pairs), fulfilling its octet rule.
- Nitrogen has 8 electrons around it: 6 from the 3 single bonds with bromine and 2 from the lone pair.
Final Structure:
- The molecule consists of nitrogen in the center with three single bonds to three bromine atoms. Nitrogen has one lone pair, and each bromine has three lone pairs.
Summary of Key Points:
- Nitrogen (N) is the central atom, forming three single bonds with bromine (Br).
- Each bromine atom has three lone pairs, and nitrogen has one lone pair.
- All atoms follow the octet rule, and the molecule has 26 valence electrons in total.
If you want a more visual representation, I can generate an image for you!