Draw the Lewis structure for the phosphorus tribromide (PBr,) molecule.

Chemistry
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ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
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**Title: Drawing the Lewis Structure for Phosphorus Tribromide (PBr₃)**

**Instruction:**
Draw the Lewis structure for the phosphorus tribromide (PBr₃) molecule.

**Explanation:**

*Understanding the Lewis Structure:*

A Lewis structure is a diagram that shows the bonding between atoms of a molecule and the lone pairs of electrons that may exist in the molecule. The Lewis structure can be used to predict the shape, polarity, reactivity, and other properties of the molecule.

*Steps to Draw the Lewis Structure for PBr₃:*

1. **Count Valence Electrons:** 
   - Phosphorus (P) has 5 valence electrons.
   - Each Bromine (Br) atom has 7 valence electrons, and there are 3 bromines.
   - Total valence electrons = 5 (P) + 3 × 7 (Br) = 5 + 21 = 26 valence electrons.

2. **Choose a Central Atom:**
   - Phosphorus (P) is less electronegative than bromine, so P will be the central atom.

3. **Draw Single Bonds:**
   - Draw single bonds between the central atom (P) and each bromine atom (Br).
   - This uses 6 valence electrons (1 bond = 2 electrons), leaving 20 valence electrons.

4. **Complete Octets for Surrounding Atoms:**
   - Place the remaining valence electrons around the bromine atoms to complete their octets (each Br needs 8 electrons). 
   - Each Br needs 6 more electrons to have a total of 8 electrons (2 from the bond and 6 lone pairs). For 3 Br atoms, 18 more electrons are used.

5. **Place Remaining Electrons on Central Atom:**
   - After surrounding atoms (Br) have complete octets, place any remaining electrons on the central atom (P).
   - 2 electrons are left after the surrounding atoms have their octets, which will be placed as a lone pair on the central atom (P).

*Tools and Icons:*

- There are various icons shown in the image, probably for drawing the Lewis structure digitally. These commonly include options for:
  - Drawing single, double, and triple bonds.
  - Adding lone pairs of electrons around atoms.
  - Erasing elements or parts of the structure.
  -
Transcribed Image Text:**Title: Drawing the Lewis Structure for Phosphorus Tribromide (PBr₃)** **Instruction:** Draw the Lewis structure for the phosphorus tribromide (PBr₃) molecule. **Explanation:** *Understanding the Lewis Structure:* A Lewis structure is a diagram that shows the bonding between atoms of a molecule and the lone pairs of electrons that may exist in the molecule. The Lewis structure can be used to predict the shape, polarity, reactivity, and other properties of the molecule. *Steps to Draw the Lewis Structure for PBr₃:* 1. **Count Valence Electrons:** - Phosphorus (P) has 5 valence electrons. - Each Bromine (Br) atom has 7 valence electrons, and there are 3 bromines. - Total valence electrons = 5 (P) + 3 × 7 (Br) = 5 + 21 = 26 valence electrons. 2. **Choose a Central Atom:** - Phosphorus (P) is less electronegative than bromine, so P will be the central atom. 3. **Draw Single Bonds:** - Draw single bonds between the central atom (P) and each bromine atom (Br). - This uses 6 valence electrons (1 bond = 2 electrons), leaving 20 valence electrons. 4. **Complete Octets for Surrounding Atoms:** - Place the remaining valence electrons around the bromine atoms to complete their octets (each Br needs 8 electrons). - Each Br needs 6 more electrons to have a total of 8 electrons (2 from the bond and 6 lone pairs). For 3 Br atoms, 18 more electrons are used. 5. **Place Remaining Electrons on Central Atom:** - After surrounding atoms (Br) have complete octets, place any remaining electrons on the central atom (P). - 2 electrons are left after the surrounding atoms have their octets, which will be placed as a lone pair on the central atom (P). *Tools and Icons:* - There are various icons shown in the image, probably for drawing the Lewis structure digitally. These commonly include options for: - Drawing single, double, and triple bonds. - Adding lone pairs of electrons around atoms. - Erasing elements or parts of the structure. -
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