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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0:50 minutes

Problem 96a

Textbook Question

Complete the following statements:
a. The number of protons and neutrons in an atom is also the _____ number.

Verified step by step guidance

Understand that the number of protons in an atom is referred to as the atomic number, which identifies the element.

Recognize that the number of neutrons can vary in atoms of the same element, leading to isotopes.

Learn that the sum of the protons and neutrons in an atom is called the mass number, which represents the total number of nucleons in the nucleus.

Recall that the mass number is not the same as the atomic mass, which is a weighted average of all isotopes of an element.

Conclude that the blank in the statement should be filled with 'mass' to complete the phrase 'mass number.'

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Key Concepts

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

Atomic Number

The atomic number is the number of protons found in the nucleus of an atom. It uniquely identifies an element and determines its position on the periodic table. For example, hydrogen has an atomic number of 1, meaning it has one proton.

Mass Number

The mass number is the total number of protons and neutrons in an atom's nucleus. It is not the same as atomic number, as it accounts for both types of nucleons. For instance, a carbon atom with 6 protons and 6 neutrons has a mass number of 12.

Nucleons

Nucleons are the particles found in the nucleus of an atom, specifically protons and neutrons. They are responsible for the atomic mass and stability of the atom. Understanding nucleons is essential for grasping concepts related to atomic structure and nuclear reactions.

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1:25m