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 Lewis electron-dot diagram correctly represents an atom in the ground state for a group 13 element?

An atom with five valence electrons, shown as five dots around the symbol

An atom with eight valence electrons, shown as eight dots around the symbol

An atom with two valence electrons, shown as two dots around the symbol

An atom with three valence electrons, each represented as a single dot around the symbol (e.g., Al with three dots)

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Verified step by step guidance

Identify the group number of the element in the periodic table. Group 13 elements have three valence electrons because they are in the 13th column of the main group elements.

Recall that Lewis electron-dot diagrams represent only the valence electrons of an atom as dots placed around the chemical symbol of the element.

For a group 13 element, place three single dots around the element's symbol, each dot representing one valence electron. These dots are usually placed one on each side (top, right, bottom, left) before pairing any electrons.

Understand that the ground state configuration means electrons are unpaired as much as possible, so the three valence electrons will be shown as three separate single dots rather than paired dots.

Verify that the other options are incorrect because: five dots would represent five valence electrons (group 15), eight dots represent a full octet (noble gases), and two dots represent two valence electrons (group 2).