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

2. Atoms & Elements

The Atom

General Chemistry

2. Atoms & Elements

The Atom

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Multiple Choice

In a water molecule (H₂O), which atom carries a partial negative charge?

Neither hydrogen nor oxygen

Oxygen

Hydrogen

Both hydrogen and oxygen

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Verified step by step guidance

Understand the concept of electronegativity: Electronegativity is a measure of an atom's ability to attract and hold onto electrons. In a molecule, the atom with higher electronegativity will attract the shared electrons more strongly.

Identify the electronegativity values: Oxygen has a higher electronegativity compared to hydrogen. This means oxygen will attract the shared electrons in the H₂O molecule more strongly than hydrogen.

Analyze the electron distribution: In a water molecule, the electrons are shared between hydrogen and oxygen. However, due to oxygen's higher electronegativity, the electrons are pulled closer to the oxygen atom.

Determine the partial charges: Because the electrons are closer to the oxygen atom, it carries a partial negative charge (δ-), while the hydrogen atoms carry a partial positive charge (δ+).

Conclude which atom carries the partial negative charge: Based on the analysis of electronegativity and electron distribution, the oxygen atom in a water molecule carries the partial negative charge.