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 absorption with the greatest energy?

n = 1 to n = 4

n = 2 to n =3

n = 6 to n = 7

n = 5 to n = 6

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Verified step by step guidance

Understand that electron transitions involve an electron moving between energy levels in an atom. Absorption occurs when an electron moves to a higher energy level, requiring energy input.

Recall that the energy difference between levels is given by the formula: \( E = -R_H \left( \frac{1}{n_1^2} - \frac{1}{n_2^2} \right) \), where \( R_H \) is the Rydberg constant, \( n_1 \) is the initial energy level, and \( n_2 \) is the final energy level.

Recognize that the greater the difference between \( n_1 \) and \( n_2 \), the greater the energy absorbed. Therefore, transitions from lower to higher levels with larger gaps will absorb more energy.

Compare the given transitions: \( n = 1 \) to \( n = 4 \), \( n = 2 \) to \( n = 3 \), \( n = 6 \) to \( n = 7 \), and \( n = 5 \) to \( n = 6 \). Calculate the energy difference for each using the formula.

Identify that the transition \( n = 1 \) to \( n = 4 \) involves the largest change in energy levels, thus representing absorption with the greatest energy.