Let’s go step by step to check each compound and make sure the atom counts are correct.
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1. H₂O
- H: 2 atoms (from subscript 2)
- O: 1 atom (no subscript = 1)
- TOTAL: 2 + 1 =
3 ✔
2. H₂O₂
- H: 2
- O: 2
- TOTAL: 2 + 2 =
4 ✔
3. CH
- C: 1
- H: 4
- TOTAL: 1 + 4 =
5 ✔
4. 3H₂O → This means 3 molecules of H₂O
- Each H₂O has 2 H and 1 O
- So for 3 molecules:
- H: 3 × 2 =
6
- O: 3 × 1 =
3
- TOTAL: 6 + 3 =
9 ✔
5. 3NaCl → 3 molecules of NaCl
- Each NaCl has 1 Na and 1 Cl
- So:
- Na: 3 × 1 =
3
- Cl: 3 × 1 =
3
- TOTAL: 3 + 3 =
6 ✔
6. 6CO₂ → 6 molecules of CO₂
- Each CO₂ has 1 C and 2 O
- So:
- C: 6 × 1 =
6
- O: 6 × 2 =
12
- TOTAL: 6 + 12 =
18 ✔
7. H₂SO₄
- H: 2
- S: 1
- O: 4
- TOTAL: 2 + 1 + 4 =
7 ✔
8. C₆H₁₂O₆
- C: 6
- H: 12
- O: 6
- TOTAL: 6 + 12 + 6 =
24 ✔
9. 2AgNO₃ → 2 molecules of AgNO₃
- Each AgNO₃ has:
- Ag: 1
- N: 1
- O: 3
- So for 2 molecules:
- Ag: 2 × 1 =
2
- N: 2 × 1 =
2
- O: 2 × 3 =
6
- TOTAL: 2 + 2 + 6 =
10 ✔
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All the tables in the worksheet are already filled out correctly!
Final Answer: All atom counts in the worksheet are accurate as shown.
Parent Tip: Review the logic above to help your child master the concept of atom practice worksheet.
