45 chemistry puzzles for 16-18 years | Resource | RSC Education - Free Printable

It looks like you've uploaded a partial image of a table related to molecular geometry and hybridization, commonly used in chemistry to describe the arrangement of atoms around a central atom. Based on the visible content, here's what we can interpret and solve:

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🔍 Visible Elements in the Table:

| Hybrid Orbital | Geometry | Bond Angle(s) | Diagram |
|----------------|------------------|--------------------|---------|
| sp³ | Tetrahedral | 109.5° | (Not shown) |
| sp³d | Trigonal bipyramidal | 90° & 120° | (Not shown) |
| sp³d² | Octahedral | 90° | (Not shown) |
| sp²d | Square planar | 90° & 180° | (Not shown) |

Wait — there's a mistake in the labeling:
- sp²d hybridization is not standard.
- The correct hybridization for square planar geometry is dsp² or d⁴s², which involves d orbitals from the same shell.

But more importantly, the diagrams in the image show two molecular geometries:

1. Trigonal planar (three bonds, 120° angles)
2. Tetrahedral (four bonds, 109.5° angles)

But wait — one diagram shows three lines, one solid, one dashed, one wedge — this suggests trigonal pyramidal or trigonal planar?

Let’s analyze carefully.

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✔ Let's Interpret the Diagrams:

#### Top Diagram (three lines):
- One solid line (in-plane),
- One dashed line (going back),
- One wedge (coming forward).
- This represents trigonal pyramidal geometry.
- But that would be sp³ hybridization with one lone pair.

Wait — but trigonal pyramidal is not typically associated with sp³d.

Hold on — let's look at the labels:

- The sp³d row has a diagram showing three bonds (with wedges/dashes), but sp³d implies five electron domains → trigonal bipyramidal.

So something is off.

Wait — perhaps the table is misaligned or cut off.

But we see:

- sp³d → should correspond to trigonal bipyramidal geometry → bond angles: 90°, 120°, 180°
- sp³d² → octahedral → 90°
- sp²d → square planar? That's unusual.

Actually, sp²d hybridization is not standard. The correct hybridization for square planar is dsp², which uses one d orbital, one s, and two p orbitals.

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🧩 Likely Task:

You are probably asked to fill in the missing entries in this table based on hybridization and geometry.

Let’s reconstruct the correct version of this table:

| Hybridization | Electron Geometry | Molecular Geometry | Bond Angles | Diagram |
|---------------|-------------------|---------------------|-------------|--------|
| sp³ | Tetrahedral | Tetrahedral | 109.5° | (4 bonds) |
| sp² | Trigonal planar | Trigonal planar | 120° | (3 bonds, flat) |
| sp | Linear | Linear | 180° | (2 bonds) |
| sp³d | Trigonal bipyramidal | Trigonal bipyramidal | 90°, 120°, 180° | (5 bonds) |
| sp³d² | Octahedral | Octahedral | 90° | (6 bonds) |
| dsp² (or sp²d) | Square planar | Square planar | 90°, 180° | (4 bonds, flat) |

Note: "sp²d" is sometimes written as dsp² — it's the same thing, just notation varies.

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🔎 What’s Missing?

Looking at your image:

- You have:
- sp³ → likely paired with tetrahedral
- sp³d → paired with trigonal bipyramidal
- sp³d² → paired with octahedral
- sp²d → paired with square planar
- 90° → appears under sp³d² (octahedral) and possibly others

But the diagram next to sp³d shows only three bonds — which is incorrect.

Wait — actually, the diagram in the sp³d row shows three lines: one solid, one dashed, one wedge — this is not trigonal bipyramidal.

That diagram looks like trigonal pyramidal, which is sp³ with a lone pair.

So perhaps the table is scrambled or misaligned.

Alternatively, maybe the task is to match the diagrams to the correct hybridization.

Let’s assume the task is:

> Match the hybrid orbitals, geometries, bond angles, and diagrams correctly.

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✔ Correct Matching:

| Hybrid Orbital | Geometry | Bond Angles | Diagram Description |
|----------------|------------------------|-------------------|----------------------|
| sp³ | Tetrahedral | ~109.5° | Four bonds, 3D shape |
| sp² | Trigonal planar | 120° | Flat triangle |
| sp | Linear | 180° | Two bonds, straight |
| sp³d | Trigonal bipyramidal | 90°, 120°, 180° | Five bonds (axial + equatorial) |
| sp³d² | Octahedral | 90° | Six bonds, 8 corners |
| dsp² (sp²d) | Square planar | 90°, 180° | Four bonds in plane |

Now, looking at the diagrams:

1. First diagram (top): three lines — one wedge, one dash, one solid — this is trigonal pyramidal (e.g., NH₃), which is sp³ hybridization.
2. Second diagram: four lines — two perpendicular, one wedge, one dash — this is square planar (e.g., XeF₄), which is dsp² hybridization.

Wait — but the second diagram has four bonds, all in plane? Not quite — the wedge and dash suggest out-of-plane, so it might be trigonal bipyramidal?

No — wedge = coming out, dash = going back.

But in square planar, all bonds are in plane — no wedge/dash needed unless showing perspective.

But square planar is usually drawn with four bonds in plane, 90° apart.

The diagram with cross and wedge/dash might represent see-saw or trigonal bipyramidal with lone pairs.

Wait — the second diagram has four lines: one horizontal, one vertical, one wedge, one dash — this is octahedral with two lone pairs (e.g., SF₄), but that’s sp³d with lone pairs.

But sp³d is trigonal bipyramidal, not octahedral.

This is confusing.

Let’s clarify:

🔹 Key Points:

- sp³d → trigonal bipyramidal → 5 electron domains → bond angles: 90°, 120°, 180°
- sp³d² → octahedral → 6 electron domains → 90° angles
- dsp² → square planar → 4 electron domains → 90° and 180°

So if the diagram shows four bonds, with two in plane, one wedge, one dash, that could be square planar — but wedge/dash implies 3D, while square planar is 2D.

Alternatively, it might be trigonal bipyramidal with lone pairs.

But without seeing the full image, it's hard.

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✔ Best Guess: The Task Is to Complete the Table

Assuming the task is to fill in the missing parts, here’s the corrected version:

| Hybrid Orbital | Geometry | Bond Angle(s) | Example Molecule |
|----------------|----------------------|-------------------|------------------|
| sp³ | Tetrahedral | 109.5° | CH₄ |
| sp² | Trigonal planar | 120° | BF₃ |
| sp | Linear | 180° | BeCl₂ |
| sp³d | Trigonal bipyramidal | 90°, 120°, 180° | PCl₅ |
| sp³d² | Octahedral | 90° | SF₆ |
| dsp² (sp²d) | Square planar | 90°, 180° | XeF₄ |

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❓ Final Answer:

Since the image is cut off, I can't see the exact question, but likely the task is to:

1. Match hybridization to geometry
2. Identify bond angles
3. Draw or interpret molecular geometry diagrams

Based on common patterns:

- sp³ → tetrahedral → 109.5°
- sp³d → trigonal bipyramidal → 90°, 120°, 180°
- sp³d² → octahedral → 90°
- dsp² → square planar → 90°, 180°

And the diagrams should reflect these.

If you can provide the full image or clarify the exact question, I can give a more precise answer.

But based on what's visible:

> ✔ The correct hybridization for square planar geometry is dsp² (often written as sp²d), not sp³d.

> ✔ sp³d corresponds to trigonal bipyramidal geometry.

> ✔ Bond angle of 90° is typical for octahedral and square planar geometries.

So if the task is to fill in the blanks, use these associations.

Let me know if you want help drawing the diagrams or identifying specific molecules!