Lewis Structures Practice Worksheet - Free Printable
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Step-by-step solution for: Lewis Structures Practice Worksheet
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Show Answer Key & Explanations
Step-by-step solution for: Lewis Structures Practice Worksheet
1. SO₂: S central, double bonds to two O atoms. One O has 2 lone pairs, the other has 3 lone pairs and a negative charge; S has 1 lone pair and a positive charge. Formal charges: S = +1, O (double bond) = 0, O (single bond) = -1.
2. CO₃²⁻: C central, single bonds to two O atoms and a double bond to one O atom. Single-bonded O atoms have 3 lone pairs and -1 charge each; double-bonded O has 2 lone pairs and 0 charge; C has 0 charge. Resonance structures exist.
3. NH₃: N central, single bonds to three H atoms, one lone pair on N. Formal charges: all atoms 0.
4. CH₄: C central, single bonds to four H atoms. Formal charges: all atoms 0.
5. H₂: Single bond between two H atoms. Formal charges: both H = 0.
6. HF: Single bond between H and F. F has 3 lone pairs. Formal charges: both atoms 0.
7. H₂O: O central, single bonds to two H atoms, two lone pairs on O. Formal charges: all atoms 0.
8. N₂: Triple bond between two N atoms, each N has one lone pair. Formal charges: both N = 0.
9. HCl: Single bond between H and Cl. Cl has 3 lone pairs. Formal charges: both atoms 0.
10. H₂S: S central, single bonds to two H atoms, two lone pairs on S. Formal charges: all atoms 0.
11. PF₅: P central, single bonds to five F atoms. No lone pairs on P. Formal charges: all atoms 0. (Expanded octet)
12. CH₃COOH: Two C atoms bonded; first C has 3 H atoms, second C double-bonded to O and single-bonded to OH. Formal charges: all atoms 0.
13. NH₄⁺: N central, single bonds to four H atoms, no lone pairs on N. Formal charge: N = +1, each H = 0.
14. NO₂⁻: N central, single bond to one O, double bond to another O. Single-bonded O has 3 lone pairs and -1 charge; double-bonded O has 2 lone pairs and 0 charge; N has 0 charge. Resonance structures exist.
15. SO₄²⁻: S central, double bonds to two O atoms and single bonds to two O atoms. Single-bonded O atoms have 3 lone pairs and -1 charge each; double-bonded O atoms have 2 lone pairs and 0 charge; S has 0 charge. Resonance structures exist.
16. NO₃⁻: N central, single bonds to two O atoms and double bond to one O atom. Single-bonded O atoms have 3 lone pairs and -1 charge each; double-bonded O has 2 lone pairs and 0 charge; N has 0 charge. Resonance structures exist.
17. OH⁻: Single bond between O and H. O has 3 lone pairs and -1 charge. Formal charge: O = -1, H = 0.
18. H₂O₂: Two O atoms single-bonded, each O bonded to one H atom. Each O has 2 lone pairs. Formal charges: all atoms 0.
19. C₂H₆: Two C atoms single-bonded, each C bonded to three H atoms. Formal charges: all atoms 0.
20. CH₃OH: C central, bonded to three H atoms and one O atom; O bonded to H. O has 2 lone pairs. Formal charges: all atoms 0.
21. C₂H₄: Two C atoms double-bonded, each C bonded to two H atoms. Formal charges: all atoms 0.
22. C₄H₁₀: Four C atoms in a chain, each terminal C bonded to three H atoms, each internal C bonded to two H atoms. All single bonds. Formal charges: all atoms 0.
23. C₂H₅OH: Two C atoms single-bonded; first C bonded to three H atoms, second C bonded to two H atoms and one O atom; O bonded to H. O has 2 lone pairs. Formal charges: all atoms 0.
24. ClO⁻: Single bond between Cl and O. Cl has 3 lone pairs, O has 3 lone pairs and -1 charge. Formal charge: Cl = 0, O = -1.
25. H₂S₂: Two S atoms single-bonded, each S bonded to one H atom. Each S has 2 lone pairs. Formal charges: all atoms 0.
26. HNO₃: N central, double bond to one O, single bonds to two O atoms (one of which is bonded to H). The O bonded to H has 2 lone pairs; the other single-bonded O has 3 lone pairs and -1 charge; double-bonded O has 2 lone pairs and 0 charge; N has 0 charge; H has 0 charge. Resonance structures exist.
27. H₂SO₄: S central, double bonds to two O atoms, single bonds to two O atoms (each bonded to H). Single-bonded O atoms have 2 lone pairs; double-bonded O atoms have 2 lone pairs. Formal charges: all atoms 0.
28. CH₃NO₂: C central, bonded to three H atoms and one N atom; N double-bonded to one O and single-bonded to another O. Single-bonded O has 3 lone pairs and -1 charge; double-bonded O has 2 lone pairs and 0 charge; N has 0 charge; C has 0 charge. Resonance structures exist.
29. C₂H₂: Two C atoms triple-bonded, each C bonded to one H atom. Formal charges: all atoms 0.
30. ClO₂⁻: Cl central, single bonds to two O atoms. Cl has 2 lone pairs. Each O has 3 lone pairs and -1 charge. Formal charge: Cl = +1, each O = -1. Resonance structures exist.
31. PO₄³⁻: P central, single bonds to four O atoms. Each O has 3 lone pairs and -1 charge. P has 0 charge. Resonance structures exist.
32. CO: Triple bond between C and O. C has 1 lone pair, O has 1 lone pair. Formal charges: C = -1, O = +1.
33. CO₂: C central, double bonds to two O atoms. Each O has 2 lone pairs. Formal charges: all atoms 0.
2. CO₃²⁻: C central, single bonds to two O atoms and a double bond to one O atom. Single-bonded O atoms have 3 lone pairs and -1 charge each; double-bonded O has 2 lone pairs and 0 charge; C has 0 charge. Resonance structures exist.
3. NH₃: N central, single bonds to three H atoms, one lone pair on N. Formal charges: all atoms 0.
4. CH₄: C central, single bonds to four H atoms. Formal charges: all atoms 0.
5. H₂: Single bond between two H atoms. Formal charges: both H = 0.
6. HF: Single bond between H and F. F has 3 lone pairs. Formal charges: both atoms 0.
7. H₂O: O central, single bonds to two H atoms, two lone pairs on O. Formal charges: all atoms 0.
8. N₂: Triple bond between two N atoms, each N has one lone pair. Formal charges: both N = 0.
9. HCl: Single bond between H and Cl. Cl has 3 lone pairs. Formal charges: both atoms 0.
10. H₂S: S central, single bonds to two H atoms, two lone pairs on S. Formal charges: all atoms 0.
11. PF₅: P central, single bonds to five F atoms. No lone pairs on P. Formal charges: all atoms 0. (Expanded octet)
12. CH₃COOH: Two C atoms bonded; first C has 3 H atoms, second C double-bonded to O and single-bonded to OH. Formal charges: all atoms 0.
13. NH₄⁺: N central, single bonds to four H atoms, no lone pairs on N. Formal charge: N = +1, each H = 0.
14. NO₂⁻: N central, single bond to one O, double bond to another O. Single-bonded O has 3 lone pairs and -1 charge; double-bonded O has 2 lone pairs and 0 charge; N has 0 charge. Resonance structures exist.
15. SO₄²⁻: S central, double bonds to two O atoms and single bonds to two O atoms. Single-bonded O atoms have 3 lone pairs and -1 charge each; double-bonded O atoms have 2 lone pairs and 0 charge; S has 0 charge. Resonance structures exist.
16. NO₃⁻: N central, single bonds to two O atoms and double bond to one O atom. Single-bonded O atoms have 3 lone pairs and -1 charge each; double-bonded O has 2 lone pairs and 0 charge; N has 0 charge. Resonance structures exist.
17. OH⁻: Single bond between O and H. O has 3 lone pairs and -1 charge. Formal charge: O = -1, H = 0.
18. H₂O₂: Two O atoms single-bonded, each O bonded to one H atom. Each O has 2 lone pairs. Formal charges: all atoms 0.
19. C₂H₆: Two C atoms single-bonded, each C bonded to three H atoms. Formal charges: all atoms 0.
20. CH₃OH: C central, bonded to three H atoms and one O atom; O bonded to H. O has 2 lone pairs. Formal charges: all atoms 0.
21. C₂H₄: Two C atoms double-bonded, each C bonded to two H atoms. Formal charges: all atoms 0.
22. C₄H₁₀: Four C atoms in a chain, each terminal C bonded to three H atoms, each internal C bonded to two H atoms. All single bonds. Formal charges: all atoms 0.
23. C₂H₅OH: Two C atoms single-bonded; first C bonded to three H atoms, second C bonded to two H atoms and one O atom; O bonded to H. O has 2 lone pairs. Formal charges: all atoms 0.
24. ClO⁻: Single bond between Cl and O. Cl has 3 lone pairs, O has 3 lone pairs and -1 charge. Formal charge: Cl = 0, O = -1.
25. H₂S₂: Two S atoms single-bonded, each S bonded to one H atom. Each S has 2 lone pairs. Formal charges: all atoms 0.
26. HNO₃: N central, double bond to one O, single bonds to two O atoms (one of which is bonded to H). The O bonded to H has 2 lone pairs; the other single-bonded O has 3 lone pairs and -1 charge; double-bonded O has 2 lone pairs and 0 charge; N has 0 charge; H has 0 charge. Resonance structures exist.
27. H₂SO₄: S central, double bonds to two O atoms, single bonds to two O atoms (each bonded to H). Single-bonded O atoms have 2 lone pairs; double-bonded O atoms have 2 lone pairs. Formal charges: all atoms 0.
28. CH₃NO₂: C central, bonded to three H atoms and one N atom; N double-bonded to one O and single-bonded to another O. Single-bonded O has 3 lone pairs and -1 charge; double-bonded O has 2 lone pairs and 0 charge; N has 0 charge; C has 0 charge. Resonance structures exist.
29. C₂H₂: Two C atoms triple-bonded, each C bonded to one H atom. Formal charges: all atoms 0.
30. ClO₂⁻: Cl central, single bonds to two O atoms. Cl has 2 lone pairs. Each O has 3 lone pairs and -1 charge. Formal charge: Cl = +1, each O = -1. Resonance structures exist.
31. PO₄³⁻: P central, single bonds to four O atoms. Each O has 3 lone pairs and -1 charge. P has 0 charge. Resonance structures exist.
32. CO: Triple bond between C and O. C has 1 lone pair, O has 1 lone pair. Formal charges: C = -1, O = +1.
33. CO₂: C central, double bonds to two O atoms. Each O has 2 lone pairs. Formal charges: all atoms 0.
Parent Tip: Review the logic above to help your child master the concept of lewis structures worksheet.
