Question

1. complete the chart below:

xef4 pcl5 so2
number of lone pairs of electrons associated with central atom (lp)
lewis structure diagram
number of electron groups associated with the central atom (eg)
geometric arrangement (ga)
molecular shape (ms)
bond angle(s)
overall dipole (yes/no -- if yes, include below)
3d drawing

Explanation:

Step1: Analyze XeF₄ (given values verified)

• LP: 2 (Xe has 8 valence e⁻; 4 bonded to F, 4 as 2 lone pairs)
• EG: 6 (4 bonding + 2 lone pairs)
• GA: Octahedral (6 electron groups)
• MS: Square planar (lone pairs opposite, 4 bonding pairs planar)
• Bond angle: 90° (planar F atoms)
• Dipole: No (symmetric)

Step2: Calculate for PCl₅

• Valence e⁻ of P: 5; all bonded to Cl → LP = 0
• EG: 5 (5 bonding groups)
• GA: Trigonal bipyramidal (5 electron groups)
• MS: Trigonal bipyramidal (no lone pairs)
• Bond angles: 90° (axial-equatorial), 120° (equatorial-equatorial)
• Dipole: No (symmetric)

Step3: Calculate for SO₂

• Valence e⁻ of S: 6; 4 bonded to 2 O (double bonds), 2 as 1 lone pair → LP = 1
• EG: 3 (2 bonding + 1 lone pair)
• GA: Trigonal planar (3 electron groups)
• MS: Bent/V-shaped (lone pair repels bonding pairs)
• Bond angle: ~120° (slightly less due to lone pair)
• Dipole: Yes (asymmetric, polar bonds not canceled)

Answer:

Property	XeF₄	PCl₅	SO₂
EG	6	5	3
GA	Octahedral	Trigonal bipyramidal	Trigonal planar
MS	Square planar	Trigonal bipyramidal	Bent/V-shaped
Bond angles	90°	90°, 120°	~120°
Overall dipole	No	No	Yes