Table of contents

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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

Which statement correctly describes the distribution of electrons in a water molecule?

The electrons are more concentrated around the hydrogen atoms, making them partially negative.

The electrons are equally shared, resulting in a nonpolar molecule.

The electrons are more concentrated around the oxygen atom, making it partially negative.

The electrons are evenly distributed between the hydrogen and oxygen atoms.

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Verified step by step guidance

Understand the concept of electronegativity: Electronegativity is the ability of an atom to attract electrons towards itself in a chemical bond. Oxygen is more electronegative than hydrogen.

Analyze the structure of a water molecule: A water molecule (H₂O) consists of one oxygen atom bonded to two hydrogen atoms.

Consider the distribution of electrons: Due to oxygen's higher electronegativity, the shared electrons in the O-H bonds are pulled closer to the oxygen atom.

Determine the partial charges: The unequal sharing of electrons results in a partial negative charge (δ-) on the oxygen atom and a partial positive charge (δ+) on the hydrogen atoms.

Conclude the polarity of the molecule: The uneven distribution of electrons makes the water molecule polar, with a net dipole moment pointing towards the oxygen atom.