Question

1. using an appropriate set of models, make molecular models of the compounds listed below and complete the table.

molecular formula	no of bond pairs	no. of lone pairs	hybridization of central atoms	molecular geometry	bond angle(s)	dipole moment (yes or no)
$\ce{bf_{3}}$				trigonal planar	$120^{\circ}$
$\ce{sncl_{2}}$
$\ce{ch_{4}}$	4	0		tetrahedral	$109.5^{\circ}$
$\ce{nh_{3}}$	3	1		tetrahedral	$109.5^{\circ}$
$\ce{h_{2}o}$	2	2		tetrahedral	$104.5^{\circ}$
$\ce{pcl_{5}}$
$\ce{sf_{4}}$
$\ce{brf_{3}}$
$\ce{xef_{2}}$
$\ce{sf_{6}}$
$\ce{if_{5}}$
$\ce{xef_{4}}$

Explanation:

Step1: Fill BeCl₂ missing columns

Central Be: 2 bond pairs, 0 lone pairs → sp hybridization, dipole no.

Step2: Fill BF₃ missing columns

Central B: 3 bond pairs, 0 lone pairs → sp² hybridization, dipole no.

Step3: Fill SnCl₂ missing columns

Central Sn: 2 bond pairs, 1 lone pair → sp² hybridization, bent geometry, ~120° bond angle, dipole yes.

Step4: Fill CH₄ missing columns

Central C: 4 bond pairs, 0 lone pairs → sp³ hybridization, dipole no.

Step5: Fill NH₃ missing columns

Central N: 3 bond pairs, 1 lone pair → sp³ hybridization, trigonal pyramidal geometry, ~107° bond angle, dipole yes.

Step6: Fill H₂O missing columns

Central O: 2 bond pairs, 2 lone pairs → sp³ hybridization, bent geometry, dipole yes.

Step7: Fill PCl₅ missing columns

Central P: 5 bond pairs, 0 lone pairs → sp³d hybridization, trigonal bipyramidal geometry, 90°/120° bond angles, dipole no.

Step8: Fill SF₄ missing columns

Central S: 4 bond pairs, 1 lone pair → sp³d hybridization, see-saw geometry, ~102°/173° bond angles, dipole yes.

Step9: Fill BrF₃ missing columns

Central Br: 3 bond pairs, 2 lone pairs → sp³d hybridization, T-shaped geometry, ~86° bond angle, dipole yes.

Step10: Fill XeF₂ missing columns

Central Xe: 2 bond pairs, 3 lone pairs → sp³d hybridization, linear geometry, 180° bond angle, dipole no.

Step11: Fill SF₆ missing columns

Central S: 6 bond pairs, 0 lone pairs → sp³d² hybridization, octahedral geometry, 90° bond angle, dipole no.

Step12: Fill IF₅ missing columns

Central I: 5 bond pairs, 1 lone pair → sp³d² hybridization, square pyramidal geometry, ~82° bond angle, dipole yes.

Step13: Fill XeF₄ missing columns

Central Xe: 4 bond pairs, 2 lone pairs → sp³d² hybridization, square planar geometry, 90° bond angle, dipole no.

Answer:

Molecular formula	No. of bond pairs	No. of lone pairs	Hybridization of central atoms	Molecular geometry	Bond angle(s)	Dipole moment (yes or no)
BF₃	3	0	sp²	Trigonal planar	120°	No
SnCl₂	2	1	sp²	Bent	~120°	Yes
CH₄	4	0	sp³	Tetrahedral	109.5°	No
NH₃	3	1	sp³	Trigonal pyramidal	~107°	Yes
H₂O	2	2	sp³	Bent	104.5°	Yes
PCl₅	5	0	sp³d	Trigonal bipyramidal	90°/120°	No
SF₄	4	1	sp³d	See-saw	~102°/173°	Yes
BrF₃	3	2	sp³d	T-shaped	~86°	Yes
XeF₂	2	3	sp³d	Linear	180°	No
SF₆	6	0	sp³d²	Octahedral	90°	No
IF₅	5	1	sp³d²	Square pyramidal	~82°	Yes
XeF₄	4	2	sp³d²	Square planar	90°	No