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 best describes the Lewis dot structure of neutral SiH2O?

Oxygen is the central atom, bonded to two hydrogen atoms and one silicon atom; silicon has two lone pairs.

Silicon is the central atom, bonded to two hydrogen atoms and one oxygen atom; oxygen has two lone pairs.

Silicon is the central atom, bonded to three hydrogen atoms and one oxygen atom; oxygen has one lone pair.

Silicon is the central atom, bonded to two hydrogen atoms and one oxygen atom; oxygen has no lone pairs.

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Verified step by step guidance

Step 1: Determine the total number of valence electrons for the molecule SiH2O. Silicon (Si) has 4 valence electrons, each hydrogen (H) has 1 valence electron, and oxygen (O) has 6 valence electrons. Sum these to find the total valence electrons available for bonding and lone pairs.

Step 2: Identify the central atom. Generally, the least electronegative atom (excluding hydrogen) is the central atom. Between silicon and oxygen, silicon is less electronegative, so silicon will be the central atom.

Step 3: Arrange the atoms around the central silicon atom. Since the formula is SiH2O, place the two hydrogens and one oxygen bonded to silicon. This accounts for three bonds around silicon.

Step 4: Distribute the remaining valence electrons to satisfy the octet rule. Each bond accounts for 2 electrons. After bonding, assign lone pairs to oxygen to complete its octet, as oxygen typically has two lone pairs in such structures.

Step 5: Confirm the Lewis structure by checking that silicon has a complete octet (8 electrons around it), oxygen has two lone pairs, and hydrogens have only one bond each (2 electrons). This will help identify the correct description of the Lewis dot structure.