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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1:05 minutes

Problem 95a

Textbook Question

Complete the following statements:
a. The atomic number gives the number of _____ in the nucleus.

Verified step by step guidance

Understand the concept of atomic number: The atomic number of an element is a fundamental property that defines the element. It represents the number of protons in the nucleus of an atom.

Recall that protons are positively charged particles located in the nucleus of an atom. The atomic number is unique for each element and determines its identity.

Note that the atomic number is also equal to the number of electrons in a neutral atom, as the positive charge of protons is balanced by the negative charge of electrons.

To complete the statement, recognize that the atomic number specifically refers to the number of protons in the nucleus of an atom.

Write the completed statement: 'The atomic number gives the number of protons in the nucleus.'

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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 a fundamental property of an element that indicates the number of protons present in the nucleus of an atom. It uniquely identifies an element and determines its position in the periodic table. For example, hydrogen has an atomic number of 1, meaning it has one proton.

Protons

Protons are positively charged subatomic particles found in the nucleus of an atom. They play a crucial role in defining the identity of an element, as the number of protons determines the element's atomic number. For instance, an atom with two protons is helium, while one with six is carbon.

Nucleus

The nucleus is the central core of an atom, containing protons and neutrons. It is responsible for most of the atom's mass and is held together by strong nuclear forces. The arrangement and number of particles in the nucleus influence the atom's stability and its chemical behavior.