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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 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

Isotopes

Anatomy & Physiology

2. Cell Chemistry & Cell Components

Isotopes

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Multiple Choice

The atomic number of nitrogen is 7. Nitrogen-15 has a greater mass number than nitrogen-14 because the atomic nucleus of nitrogen-15 contains ________.

7 neutrons.

8 neutrons.

8 protons.

15 protons.

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Verified step by step guidance

Understand that the atomic number of an element represents the number of protons in its nucleus. For nitrogen, this is 7 protons.

Recognize that the mass number of an isotope is the sum of protons and neutrons in the nucleus.

Identify that nitrogen-15 and nitrogen-14 are isotopes of nitrogen, meaning they have the same number of protons but different numbers of neutrons.

Calculate the number of neutrons in nitrogen-15 by subtracting the atomic number (7 protons) from the mass number (15). This gives you the number of neutrons in nitrogen-15.

Compare the number of neutrons in nitrogen-15 to nitrogen-14. Nitrogen-14 has 7 neutrons (14 - 7 = 7), so nitrogen-15 must have one more neutron than nitrogen-14, resulting in 8 neutrons.