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 is the correct Lewis electron-dot structure for Br2(l), a neutral diatomic bromine molecule in the liquid state?

:Br::Br:

:Br:‒‒:Br:

:Br:‒:Br:

Br‒Br

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Verified step by step guidance

Recall that a Lewis electron-dot structure represents the valence electrons of atoms, showing bonding pairs as lines (or pairs of dots) between atoms and lone pairs as dots around atoms.

Determine the number of valence electrons for each bromine atom. Bromine (Br) is in group 17, so it has 7 valence electrons.

Since Br2 is a diatomic molecule, the two bromine atoms share one pair of electrons to form a single covalent bond. This bond is represented by a single line (‒) between the two Br atoms.

Each bromine atom will have three lone pairs (6 electrons) remaining after sharing one pair for the bond, so place three pairs of dots around each Br atom to represent these lone pairs.

Combine these elements to draw the Lewis structure: two Br atoms connected by a single bond (‒), with three lone pairs of dots around each Br, ensuring the total valence electrons (14) are correctly represented.