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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2:48 minutes

Problem 7

Textbook Question

A substance containing atoms of different elements that are bonded together is called a(n)
(a) Molecule
(b) Compound
(c) Mixture
(d) Isotope
(e) Solution

Verified step by step guidance

Step 1: Begin by understanding the definitions of the terms provided in the options. A molecule is a group of atoms bonded together, representing the smallest fundamental unit of a chemical compound.

Step 2: Define a compound. A compound is a substance formed when two or more different elements are chemically bonded together in fixed proportions.

Step 3: Define a mixture. A mixture is a combination of two or more substances that are not chemically bonded and can be separated by physical means.

Step 4: Define an isotope. Isotopes are variants of a particular chemical element that have the same number of protons but different numbers of neutrons.

Step 5: Define a solution. A solution is a homogeneous mixture where one substance (solute) is dissolved in another (solvent). Compare these definitions to identify the correct term for a substance containing atoms of different elements bonded together.

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Key Concepts

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

Molecule

A molecule is the smallest unit of a chemical compound that retains its chemical properties. It consists of two or more atoms bonded together, which can be of the same or different elements. For example, O2 is a molecule made of two oxygen atoms, while H2O is a molecule made of hydrogen and oxygen.

Compound

A compound is a substance formed when two or more different elements chemically bond together in fixed proportions. Compounds have unique properties that differ from the individual elements that compose them. For instance, sodium chloride (NaCl) is a compound made from sodium and chlorine, exhibiting properties distinct from both elements.

Mixture

A mixture is a combination of two or more substances that are not chemically bonded and retain their individual properties. Mixtures can be homogeneous, where the composition is uniform (like saltwater), or heterogeneous, where the composition is not uniform (like a salad). Unlike compounds, the components of a mixture can be separated by physical means.

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Related Practice

Textbook Question

Which of the following is (are) true concerning the atomic nucleus?

a. It contains the mass of the atom.

b. The negatively charged subatomic particles are here.

c. Subatomic particles can be ejected.

d. It contains subatomic particles that determine atomic number.

e. It contains subatomic particles that interact with other atoms.

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Textbook Question

Pick out the correct match(es) of element and number of valence electrons. Draw a planetary model of each atom to help you choose the best answer.

a. Oxygen—6

b. Chlorine—8

c. Phosphorus—5

d. Nitrogen—3

e. Carbon—4

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Textbook Question

Define radioactivity. If an element has three isotopes, which of them (the lightest, the one with an intermediate mass, or the heaviest) is most likely to be a radioisotope, and why?

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Textbook Question

Define molecule as it relates to molecular substances and compounds.

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Textbook Question

An oxygen atom has eight protons.

(b) How many more electrons will it take to fill the outermost energy level?

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Textbook Question

An oxygen atom has eight protons.

(a) Sketch in the arrangement of electrons around the nucleus of the oxygen atom in the following diagram.

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