Molecular geometry worksheet with diagrams and labels for different chemical compounds.

Let’s go step by step to fill in the missing parts of the table for molecular geometry.

We are given molecules: CH₄, BH₃, H₂O, and CCl₄. For each, we need to find:
- Lewis Structure (already drawn)
- Electron Shape (based on electron domains around central atom)
- Sketch (already drawn)
- Molecular Shape (based on arrangement of atoms, ignoring lone pairs)
- Polarity (polar or nonpolar)

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1. CH (Methane)

Central atom: Carbon
Bonded to: 4 Hydrogen atoms
Lone pairs on carbon: 0
Total electron domains: 4 → tetrahedral electron shape
All bonds are identical, symmetric → molecular shape is also tetrahedral
Symmetric + no lone pairs → nonpolar

✔ Already filled correctly in table.

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2. BH₃ (Boron trihydride)

Central atom: Boron
Bonded to: 3 Hydrogen atoms
Lone pairs on boron: 0 (boron can have incomplete octet)
Total electron domains: 3 → trigonal planar electron shape
No lone pairs → molecular shape = trigonal planar
Symmetric → nonpolar

But wait — the table says “trigonal planar” under Electron Shape, sketch shows flat triangle, and Molecular Shape says “trigonal planar”, polarity says “nonpolar”. That’s correct.

Actually, looking again — the table has a blank under “Molecular Shape” for BH₃? No — it says “trigonal planar” already. Wait, let me check the original image description...

Wait — user said: “Solve the problem accurately.” and uploaded an image with blanks. But in the text provided, some fields are blank? Let me re-read the user input.

Looking at the table as described:

Row 1: CH₄ — all filled.

Row 2: BH₃ — Electron Shape: trigonal planar; Sketch: shown; Molecular Shape: ??? (blank?); Polarity: nonpolar

In the user’s text representation:

> 2. BH₃ | [Lewis] | trigonal planar | [sketch] | _______ | nonpolar

Ah! So “Molecular Shape” is blank for BH₃.

Similarly:

Row 3: H₂O — Electron Shape: tetrahedral; Sketch: bent; Molecular Shape: ??? ; Polarity: polar

Row 4: CCl₄ — Electron Shape: tetrahedral; Sketch: tetrahedral; Molecular Shape: ??? ; Polarity: nonpolar

So we need to fill:

- BH₃ → Molecular Shape
- H₂O → Molecular Shape
- CCl₄ → Molecular Shape

Also, double-check polarity if needed.

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BH₃:

Electron domains: 3 bonding, 0 lone → trigonal planar electron geometry
Since no lone pairs, molecular shape = electron shape → trigonal planar

Polarity: symmetric, bond dipoles cancel → nonpolar ✔ already given

→ Fill: trigonal planar

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H₂O:

Central atom: Oxygen
Bonded to: 2 H atoms
Lone pairs: 2 (oxygen has 6 valence electrons; uses 2 for bonds, leaves 4 → 2 lone pairs)
Total electron domains: 4 → tetrahedral electron geometry
But molecular shape considers only atoms: 2 atoms + 2 lone pairs → bent (or angular)

Polarity: bent shape + polar O-H bonds → dipole doesn’t cancel → polar ✔ already given

→ Fill: bent

(Note: sometimes called “angular”, but “bent” is standard in high school chem)

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CCl₄:

Central atom: Carbon
Bonded to: 4 Cl atoms
Lone pairs: 0
Electron domains: 4 → tetrahedral electron geometry
No lone pairs → molecular shape = tetrahedral

Polarity: even though C-Cl bonds are polar, molecule is symmetric → dipoles cancel → nonpolar ✔ already given

→ Fill: tetrahedral

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Now, let’s verify everything:

| Molecule | Electron Shape | Molecular Shape | Polarity |
|----------|--------------------|--------------------|------------|
| CH₄ | tetrahedral | tetrahedral | nonpolar |
| BH₃ | trigonal planar | trigonal planar | nonpolar |
| H₂O | tetrahedral | bent | polar |
| CCl₄ | tetrahedral | tetrahedral | nonpolar |

All match known chemistry.

Final Answer: The missing molecular shapes are:

- BH₃: trigonal planar
- H₂O: bent
- CCl₄: tetrahedral

But since the question likely expects us to fill the blanks in order as they appear in the table, and assuming the table lists them row by row, the answers to fill are:

For BH₃ row → Molecular Shape: trigonal planar
For H₂O row → Molecular Shape: bent
For CCl₄ row → Molecular Shape: tetrahedral

If the task is to list what goes in the blanks, that’s it.

Final Answer:
trigonal planar, bent, tetrahedral