Table of contents

1. Introduction to Anatomy & Physiology5h 43m
2. Cell Chemistry & Cell Components12h 36m
3. Energy & Cell Processes10h 6m
4. Tissues & Histology10h 3m
5. Integumentary System2h 20m
6. Bones & Skeletal Tissue2h 16m
7. The Skeletal System2h 35m
8. Joints2h 17m
9. Muscle Tissue2h 33m
10. Muscles1h 11m
11. Nervous Tissue and Nervous System1h 35m
12. The Central Nervous System1h 6m
- Introduction to the Central Nervous System
  18m
- The Cerebrum
  48m
13. The Peripheral Nervous System1h 26m
14. The Autonomic Nervous System1h 38m
15. The Special Senses2h 41m
16. The Endocrine System2h 48m
17. The Blood3h 22m
18. The Heart3h 42m
19. The Blood Vessels3h 35m
20. The Lymphatic System3h 16m
21. The Immune System14h 37m
22. The Respiratory System3h 20m
23. The Digestive System2h 5m
24. Metabolism and Nutrition4h 0m
25. The Urinary System2h 39m
26. Fluid and Electrolyte Balance, Acid Base Balance37m
27. The Reproductive System2h 5m
28. Human Development1h 21m
29. Heredity3h 32m

2. Cell Chemistry & Cell Components

Atoms- Smallest Unit of Matter

Anatomy & Physiology

2. Cell Chemistry & Cell Components

Atoms- Smallest Unit of Matter

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1:40 minutes

Problem 3

Textbook Question

All of the following are examples of the four major elements contributing to body mass except:
a. Hydrogen
b. Carbon
c. Nitrogen
d. Sodium
e. Oxygen

Verified step by step guidance

Understand the role of subatomic particles in an atom: Atoms consist of protons, neutrons, and electrons. Each of these particles has specific properties and functions within the atom.

Recall that chemical behavior is determined by how atoms interact with each other, which involves the formation or breaking of chemical bonds. These interactions occur in the outermost electron shell, known as the valence shell.

Focus on electrons: Electrons are negatively charged particles that orbit the nucleus of an atom. The arrangement and number of electrons in the valence shell dictate how an atom will bond with other atoms, influencing its chemical behavior.

Eliminate other options: Neutrons are neutral particles and do not directly influence chemical bonding. Protons, while positively charged, are located in the nucleus and do not participate in chemical interactions. Ions are atoms or molecules that have gained or lost electrons, but they are a result of chemical behavior, not the cause.

Conclude that the subatomic particles responsible for the chemical behavior of atoms are electrons, as they are directly involved in forming chemical bonds and determining reactivity.

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Key Concepts

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

Electrons

Electrons are negatively charged subatomic particles that orbit the nucleus of an atom. They play a crucial role in chemical bonding and reactions, as their arrangement and interactions determine how atoms connect with one another. The behavior of electrons in different energy levels influences the chemical properties of elements.

Chemical Behavior

Chemical behavior refers to how atoms interact and combine to form molecules and compounds. This behavior is largely dictated by the arrangement of electrons, particularly those in the outermost shell, known as valence electrons. Understanding chemical behavior is essential for predicting how substances will react under various conditions.

Ions

Ions are charged particles that form when atoms gain or lose electrons. This process alters the atom's overall charge, leading to the formation of cations (positively charged) or anions (negatively charged). Ions are fundamental in chemical reactions, especially in ionic bonding, where oppositely charged ions attract each other to form stable compounds.