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 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

Atoms- Smallest Unit of Matter

Anatomy & Physiology

2. Cell Chemistry & Cell Components

Atoms- Smallest Unit of Matter

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Multiple Choice

An uncharged atom of nitrogen (atomic number = 7) has __________.

seven neutrons and six protons

seven protons and seven neutrons

seven neutrons and seven electrons

seven protons and seven electrons

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Verified step by step guidance

Understand that the atomic number of an element represents the number of protons in an atom of that element. For nitrogen, the atomic number is 7, which means it has 7 protons.

Recognize that in an uncharged (neutral) atom, the number of protons is equal to the number of electrons. Therefore, an uncharged nitrogen atom also has 7 electrons.

Recall that the number of neutrons in an atom can vary, leading to different isotopes of the element. However, the problem does not specify isotopes, so focus on the atomic number.

Identify that the correct statement must include both the number of protons and electrons for an uncharged atom. Since nitrogen has 7 protons and 7 electrons, the correct answer is 'seven protons and seven electrons'.

Review the options given: 'seven neutrons and six protons', 'seven protons and seven neutrons', and 'seven neutrons and seven electrons'. The correct choice based on the atomic number and neutrality is 'seven protons and seven electrons'.