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

Subatomic Particles (Simplified)

GOB Chemistry

2. Atoms and the Periodic Table

Subatomic Particles (Simplified)

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0:41 minutes

Problem 93c

Textbook Question

Indicate if each of the following statements is true or false:
c. The atomic mass unit is based on a carbon atom with six protons and six neutrons.

Verified step by step guidance

Understand the concept of atomic mass unit (amu): The atomic mass unit is a standard unit of mass used to express atomic and molecular weights. It is defined based on the carbon-12 isotope.

Recall the definition of the carbon-12 isotope: The carbon-12 isotope has six protons and six neutrons in its nucleus, giving it a total of 12 nucleons.

Know the basis of the atomic mass unit: By definition, 1 atomic mass unit (amu) is exactly 1/12th the mass of a carbon-12 atom.

Evaluate the statement: The statement claims that the atomic mass unit is based on a carbon atom with six protons and six neutrons, which aligns with the definition of the carbon-12 isotope.

Conclude whether the statement is true or false: Since the atomic mass unit is indeed based on the carbon-12 isotope, the statement is true.

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Key Concepts

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

Atomic Mass Unit (amu)

The atomic mass unit (amu) is a standard unit of mass that quantifies mass on an atomic or molecular scale. It is defined as one twelfth of the mass of a carbon-12 atom, which has six protons and six neutrons. This unit allows for the comparison of the masses of different atoms and molecules in a consistent manner.

Carbon-12 Isotope

Carbon-12 is a stable isotope of carbon, consisting of six protons and six neutrons. It is the most abundant isotope of carbon and serves as the standard reference for defining the atomic mass unit. The choice of carbon-12 as a reference point is crucial for ensuring uniformity in atomic mass measurements across different elements.

Protons and Neutrons

Protons and neutrons are subatomic particles found in the nucleus of an atom. Protons carry a positive charge, while neutrons are neutral. The number of protons determines the atomic number and identity of an element, while the total number of protons and neutrons gives the atomic mass. Understanding their roles is essential for grasping atomic structure and mass calculations.