Printable PDF educational worksheet for practicing chemical formulas using a domino matching game.

Looking at the image, this is a “Chemical Formulas Dominoes” printable activity. The goal is to match chemical names with their correct chemical formulas using domino-style cards.

On the left side of the image, there’s a column of domino pieces. Each piece has:
- A chemical name (like “Nitrogen dioxide”, “carbon monoxide”, etc.)
- A blank space or a formula on the other half
- Wavy lines indicating where they connect to other dominoes

The task says:
> You have found a box of chemical formulas and names. Match each chemical name with the chemical formula on the card with the same number.

There’s also an example shown:
Domino #2 shows “2” on one side and a wavy line on the other — meaning it connects to another domino that also has “2”.

So, for each numbered domino on the left, you need to find the matching formula on the right-hand grid (the “Student Recording Sheet”) and write the number in the correct box.

But here’s the key: The image doesn’t actually show the formulas paired with the names on the left — it only shows the names and empty slots. That means this is likely a worksheet where students are meant to fill in the matching formula numbers based on their knowledge.

Since no specific question is asked (like “What is the formula for carbon monoxide?”), and since the user didn’t ask for explanation, teaching, or practice — just to solve the problem — I must assume the “problem” is to identify what this activity is for.

However, looking again — the instruction says “Solve the problem accurately.” But there’s no explicit problem stated beyond the activity description.

Wait — perhaps the “problem” is to recognize that this is a matching activity, and the student needs to pair each chemical name with its correct formula by writing the corresponding domino number in the recording sheet.

But without the actual formulas listed next to the names on the left, we can’t do the matching ourselves.

Actually — rereading the image text:

Left side:
- Nitrogen dioxide → ?
- carbon monoxide → ?
- Silicon dioxide → ?
- Boron trioxide → ?
- iron(III) bromide → ?
- sulfuric acid → ?
- potassium iodide → ?

Right side:
A grid of 26 boxes (numbered 1–26) labeled “Chemical Formulas DOMINOES Student Recording Sheet”

And an example: Domino #2 connects to another #2.

This suggests that each domino on the left has a number (not visible in the image?), and the student must find which formula matches that name, then write the number of the matching formula domino in the recording sheet.

But since the image doesn’t show the numbers on the left dominoes, nor the formulas on the right, we cannot complete the matching.

Therefore, the only thing we can “solve” is to explain what the activity is.

But the user said “Solve the problem accurately” — and if there’s no specific problem, maybe the intent is to recognize that this is a self-contained activity that requires external knowledge.

Alternatively — perhaps the “problem” is simply to understand that this is a domino matching game for chemical formulas, and the answer is that the student should match each name to its formula by finding the correct domino number.

But since no specific question is posed, and the options are false, I think the best approach is to provide the final answer as:

This is a chemical formulas domino matching activity. Students match each chemical name to its correct formula by writing the corresponding domino number in the recording sheet.

But wait — the rules say: “If an option is false, completely omit that section.” And “Final Answer: [Provide only the final correct answer — this should come AFTER all reasoning and explanations.]”

Since no options are true, I still need to provide a Final Answer.

Perhaps the “problem” is to identify the purpose of the worksheet.

Let me reframe: The image shows a worksheet titled “Chemical Formulas Dominoes”. The task is to match chemical names with their formulas using domino pieces. The student will use the recording sheet to write down which domino number corresponds to each name.

Since no specific question is asked, the “solution” is to recognize the activity type.

But that seems too vague.

Another idea: Maybe the “problem” is implied — for example, “What is the chemical formula for nitrogen dioxide?” — but that’s not stated.

Looking at the left column:

1. Nitrogen dioxide → NO₂
2. carbon monoxide → CO
3. Silicon dioxide → SiO₂
4. Boron trioxide → B₂O₃
5. iron(III) bromide → FeBr₃
6. sulfuric acid → H₂SO₄
7. potassium iodide → KI

These are standard formulas. If the dominoes on the right contain these formulas, then the student would match them.

But since the image doesn’t show the formulas on the right, we can’t assign numbers.

Therefore, the only thing we can do is state the correct formulas for the names listed.

Perhaps that’s the “problem” — to provide the formulas for the given names.

Let me check the image again: The left side lists 7 chemical names. The right side has a grid of 26 boxes. The example shows domino #2.

Maybe the “problem” is to fill in the formulas for those 7 names.

That makes sense — because otherwise, there’s nothing to solve.

So, I’ll assume the task is: Given the chemical names on the left, provide their correct chemical formulas.

Step-by-step:

1. Nitrogen dioxide: Nitrogen is N, dioxide means two oxygen atoms → NO₂
2. carbon monoxide: Carbon is C, monoxide means one oxygen → CO
3. Silicon dioxide: Silicon is Si, dioxide → SiO₂
4. Boron trioxide: Boron is B, trioxide means three oxygen → B₂O₃ (because boron typically forms B³⁺, so to balance O²⁻, it's B₂O₃)
5. iron(III) bromide: Iron(III) means Fe³⁺, bromide is Br⁻, so to balance: FeBr₃
6. sulfuric acid: This is a common acid, formula is H₂SO₄
7. potassium iodide: Potassium is K⁺, iodide is I⁻, so KI

All these are standard and correct.

Now, verify:

- NO₂: yes, nitrogen dioxide
- CO: carbon monoxide
- SiO₂: silicon dioxide
- B₂O₃: boron trioxide — correct, as boron has +3 oxidation state
- FeBr₃: iron(III) bromide — yes
- H₂SO₄: sulfuric acid — yes
- KI: potassium iodide — yes

No mistakes.

So, the final answer is the list of formulas.

But the response format says: “Final Answer: [Provide only the final correct answer]”

Since the original task is to match names to formulas, and we’ve derived the formulas, I’ll present them as the answer.

Final Answer:
NO₂, CO, SiO₂, B₂O₃, FeBr₃, H₂SO₄, KI