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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 Heart2h 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

Carbon

Anatomy & Physiology

2. Cell Chemistry & Cell Components

Carbon

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Multiple Choice

The carbon atom possesses __________ valence electron(s).

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Understand that valence electrons are the electrons in the outermost shell of an atom, which are important for chemical bonding.

Recall that carbon is an element with the atomic number 6, meaning it has 6 protons and, in a neutral atom, 6 electrons.

Determine the electron configuration of carbon. The first two electrons fill the 1s orbital, and the next two fill the 2s orbital, leaving two electrons to fill the 2p orbital.

Recognize that the electrons in the second shell (2s and 2p orbitals) are the valence electrons for carbon.

Count the total number of electrons in the second shell (2s and 2p orbitals), which are 4, to determine the number of valence electrons in a carbon atom.