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

3. Ionic Compounds

Periodic Trend: Electron Affinity (Simplified)

GOB Chemistry

3. Ionic Compounds

Periodic Trend: Electron Affinity (Simplified)

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Multiple Choice

Determine which atom in the following set has the largest electron affinity:N, O, C, B, Ne
a) N b) O c) C d) B e) Ne

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Verified step by step guidance

Understand the concept of electron affinity: Electron affinity is the energy change that occurs when an electron is added to a neutral atom in the gaseous state to form a negative ion. Generally, the more negative the electron affinity, the more an atom attracts electrons.

Consider the periodic trend: Electron affinity generally increases across a period from left to right in the periodic table. This is because atoms become more electronegative and have a greater tendency to gain electrons as you move across a period.

Analyze the given elements: The elements provided are N, O, C, B, and Ne. These elements are all in the second period of the periodic table.

Identify the exceptions: While the trend suggests that electron affinity increases across a period, there are exceptions. For example, noble gases like Ne have very low electron affinities because they have a complete valence shell and do not tend to gain electrons.

Compare the elements: Among the elements N, O, C, B, and Ne, oxygen (O) has the highest electron affinity. This is because it is more electronegative and has a greater tendency to gain an electron compared to the others in the set.