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

1. Matter and Measurements

Physical Properties

GOB Chemistry

1. Matter and Measurements

Physical Properties

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2:56 minutes

Problem 9a

Textbook Question

Describe each of the following as a physical or chemical property:
a. Chromium is a steel-gray solid.

Verified step by step guidance

Step 1: Understand the difference between physical and chemical properties. A physical property is a characteristic of a substance that can be observed or measured without changing its chemical identity (e.g., color, state, melting point). A chemical property describes a substance's ability to undergo a chemical change or reaction (e.g., flammability, reactivity).

Step 2: Analyze the given property. The problem states that chromium is a steel-gray solid. This describes the appearance and state of chromium, which are observable characteristics.

Step 3: Determine if observing this property involves a chemical change. Since describing the color and state of chromium does not involve altering its chemical composition, this is a physical property.

Step 4: Conclude that the property described (steel-gray solid) is a physical property because it pertains to the observable characteristics of chromium without any chemical transformation.

Step 5: Remember that physical properties can often be observed directly, while chemical properties require a reaction to be observed.

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Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

Physical Property

A physical property is a characteristic of a substance that can be observed or measured without changing its chemical identity. Examples include color, density, melting point, and state of matter. In the context of the question, the description of chromium as a 'steel-gray solid' is a physical property, as it pertains to its appearance and state.

Chemical Property

A chemical property refers to a substance's ability to undergo a specific chemical change or reaction. This includes reactivity with other chemicals, flammability, and acidity. Unlike physical properties, chemical properties can only be observed during a chemical reaction, which alters the substance's identity.

Elemental Characteristics

Elements are pure substances that cannot be broken down into simpler substances by chemical means. Each element has unique properties that define its behavior in chemical reactions. Chromium, as a transition metal, exhibits specific elemental characteristics, such as its solid state at room temperature and its metallic luster, which contribute to its classification in the periodic table.

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Describe each of the following as a physical or chemical property: a. Chromium is a steel-gray solid.

Key Concepts

Physical Property

Chemical Property

Elemental Characteristics

Watch next

Describe each of the following as a physical or chemical property:
a. Chromium is a steel-gray solid.