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

Atomic Theory

General Chemistry

2. Atoms & Elements

Atomic Theory

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Multiple Choice

Which of the following statements is true regarding scientific theories in the context of atomic theory?

Theories are well-substantiated explanations that can be modified with new evidence.

Theories are guesses that scientists make without any basis.

Theories are unchangeable and remain constant over time.

Theories are the same as hypotheses and require no experimental evidence.

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Verified step by step guidance

Understand the definition of a scientific theory: A scientific theory is a well-substantiated explanation of some aspect of the natural world that is based on a body of evidence and has been repeatedly confirmed through observation and experimentation.

Recognize that scientific theories are not guesses: Theories are developed through rigorous testing and are supported by a significant amount of evidence, distinguishing them from mere guesses.

Acknowledge that scientific theories can be modified: As new evidence becomes available, scientific theories can be refined or adjusted to better explain the observed phenomena.

Differentiate between theories and hypotheses: A hypothesis is a proposed explanation for a phenomenon that is testable and can be confirmed or refuted through experimentation, whereas a theory is a well-established explanation supported by evidence.

Conclude that the correct statement is: 'Theories are well-substantiated explanations that can be modified with new evidence.' This reflects the dynamic and evidence-based nature of scientific theories.