Table of contents

1. Intro to General Chemistry3h 48m
2. Atoms & Elements4h 16m
3. Chemical Reactions4h 10m
4. BONUS: Lab Techniques and Procedures1h 38m
5. BONUS: Mathematical Operations and Functions48m
6. Chemical Quantities & Aqueous Reactions3h 53m
7. Gases3h 49m
8. Thermochemistry2h 37m
9. Quantum Mechanics2h 58m
10. Periodic Properties of the Elements3h 9m
11. Bonding & Molecular Structure3h 29m
12. Molecular Shapes & Valence Bond Theory1h 57m
13. Liquids, Solids & Intermolecular Forces2h 23m
14. Solutions3h 1m
15. Chemical Kinetics2h 53m
16. Chemical Equilibrium2h 29m
17. Acid and Base Equilibrium5h 1m
18. Aqueous Equilibrium4h 47m
19. Chemical Thermodynamics1h 50m
20. Electrochemistry2h 42m
21. Nuclear Chemistry2h 36m
22. Organic Chemistry5h 7m
23. Chemistry of the Nonmetals2h 39m
24. Transition Metals and Coordination Compounds3h 16m

11. Bonding & Molecular Structure

Lewis Dot Structures: Neutral Compounds

General Chemistry

11. Bonding & Molecular Structure

Lewis Dot Structures: Neutral Compounds

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Multiple Choice

Which of the following statements correctly describes the Lewis dot structure of the neutral compound NH3BF3?

NH3 donates a lone pair to BF3, forming a coordinate covalent bond between nitrogen and boron.

NH3 and BF3 form an ionic bond with complete electron transfer from NH3 to BF3.

BF3 donates a lone pair to NH3, forming a coordinate covalent bond between boron and nitrogen.

NH3 and BF3 share electrons equally between all atoms, resulting in no coordinate covalent bonds.

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Verified step by step guidance

Step 1: Identify the nature of NH3 and BF3 molecules. NH3 (ammonia) has a lone pair of electrons on the nitrogen atom, making it a Lewis base (electron pair donor). BF3 (boron trifluoride) has an incomplete octet on boron, making it a Lewis acid (electron pair acceptor).

Step 2: Understand the concept of coordinate covalent bonds (also called dative bonds), where one atom donates both electrons to form a bond. Since NH3 has a lone pair and BF3 has an empty orbital, NH3 can donate its lone pair to BF3.

Step 3: Analyze the bonding interaction between NH3 and BF3. NH3 donates its lone pair to the electron-deficient boron in BF3, forming a coordinate covalent bond between nitrogen and boron.

Step 4: Evaluate the other options: ionic bonding would require complete electron transfer, which is unlikely here because both species are neutral molecules and the interaction is based on electron pair donation, not full transfer.

Step 5: Conclude that the correct description is that NH3 donates a lone pair to BF3, forming a coordinate covalent bond between nitrogen and boron.