Table of contents

1. Matter and Measurements4h 31m
2. Atoms and the Periodic Table5h 23m
3. Ionic Compounds2h 18m
4. Molecular Compounds2h 18m
5. Classification & Balancing of Chemical Reactions3h 17m
6. Chemical Reactions & Quantities2h 27m
7. Energy, Rate and Equilibrium3h 46m
8. Gases, Liquids and Solids3h 25m
9. Solutions4h 10m
10. Acids and Bases3h 29m
11. Nuclear Chemistry56m
BONUS: Lab Techniques and Procedures1h 38m
BONUS: Mathematical Operations and Functions47m
12. Introduction to Organic Chemistry1h 34m
13. Alkenes, Alkynes, and Aromatic Compounds2h 12m
14. Compounds with Oxygen or Sulfur1h 6m
15. Aldehydes and Ketones1h 1m
16. Carboxylic Acids and Their Derivatives1h 11m
17. Amines39m
18. Amino Acids and Proteins1h 51m
19. Enzymes1h 37m
20. Carbohydrates1h 41m
21. The Generation of Biochemical Energy2h 8m
22. Carbohydrate Metabolism2h 22m
23. Lipids2h 26m
24. Lipid Metabolism1h 45m
25. Protein and Amino Acid Metabolism1h 37m
26. Nucleic Acids and Protein Synthesis2h 54m

2. Atoms and the Periodic Table

Bohr Model (Simplified)

GOB Chemistry

2. Atoms and the Periodic Table

Bohr Model (Simplified)

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Multiple Choice

Which of the electron transitions represents an example of emission?

n = 2 to n = 4

n = 3 to n = 6

n = 3 to n = 1

n = 4 to n = 7

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Verified step by step guidance

Understand the concept of electron transitions: Electrons in an atom can move between different energy levels, denoted by 'n'. When an electron moves from a higher energy level to a lower energy level, it emits energy in the form of light. This process is known as emission.

Identify the direction of transition: Emission occurs when an electron transitions from a higher energy level to a lower energy level. Conversely, absorption occurs when an electron moves from a lower energy level to a higher energy level.

Analyze each transition: For each given transition, determine whether the electron is moving to a higher or lower energy level. For example, n = 2 to n = 4 is a transition from a lower to a higher energy level, indicating absorption.

Apply the concept to the correct answer: The transition n = 3 to n = 1 involves an electron moving from a higher energy level (n = 3) to a lower energy level (n = 1), which is characteristic of emission.

Conclude with the correct transition: Based on the analysis, the transition n = 3 to n = 1 represents an example of emission, as it involves the release of energy when the electron moves to a lower energy level.