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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

Periodic Table: Phases (Simplified)

GOB Chemistry

2. Atoms and the Periodic Table

Periodic Table: Phases (Simplified)

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Multiple Choice

Which of the following exists as a diatomic solid at room temperature?

Bromine

Tellurium

Sulfur

Chlorine

Iodine

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Identify the elements that commonly exist as diatomic molecules. These are typically the halogens and some other nonmetals. The most common diatomic elements are H2, N2, O2, F2, Cl2, Br2, and I2.

Consider the physical states of these diatomic molecules at room temperature (approximately 25°C or 298 K). For example, H2, N2, O2, F2, and Cl2 are gases, Br2 is a liquid, and I2 is a solid.

Recognize that iodine (I2) is unique among the diatomic elements listed because it is a solid at room temperature.

Understand that the question is asking for a diatomic solid, which means we are looking for an element that forms a diatomic molecule and is in the solid state at room temperature.

Conclude that iodine (I2) is the diatomic solid at room temperature, as it is the only element among the options that fits this description.