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Ch. 2 The Chemical Level of Organization
Martini - Fundamentals of Anatomy and Physiology 12th Edition
Martini, Nath, Bartholomew12th EditionFundamentals of Anatomy and PhysiologyISBN: 9780137854011Not the one you use?Change textbook
All textbooksMartini, Nath, Bartholomew 12th EditionCh. 2 The Chemical Level of OrganizationProblem 7
Chapter 2, Problem 7

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

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1
Understand the definitions of each term given in the options:
A molecule is formed when two or more atoms bond together, which can be atoms of the same or different elements.
A compound specifically refers to a substance made of atoms of different elements chemically bonded together.
A mixture is a physical combination of substances that are not chemically bonded and can be separated by physical means.
An isotope refers to atoms of the same element that have different numbers of neutrons, and a solution is a homogeneous mixture of two or more substances.

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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 formed when two or more atoms chemically bond together. These atoms can be of the same element or different elements. Molecules represent the smallest unit of a substance that retains its chemical properties.
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Compound

A compound is a substance made of atoms of different elements chemically bonded in fixed proportions. Compounds have unique properties different from their constituent elements and can only be separated by chemical means.
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Mixture

A mixture consists of two or more substances physically combined without chemical bonding. The components retain their individual properties and can be separated by physical methods like filtration or evaporation.
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Related Practice
Textbook Question

All the chemical reactions that occur in the human body are collectively referred to as

(a) Anabolism

(b) Catabolism

(c) Metabolism

(d) Homeostasis

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Textbook Question

Isotopes of an element differ from each other in the number of

(a) Protons in the nucleus

(b) Neutrons in the nucleus

(c) Electrons in the outer shells

(d) a, b, and c are all correct

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Textbook Question

All organic compounds in the human body contain all of the following elements except

(a) Hydrogen

(b) Oxygen

(c) Carbon

(d) Calcium

(e) Both a and d

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Textbook Question

The speed, or rate, of a chemical reaction is influenced by

(a) The presence of catalysts

(b) The temperature

(c) The concentration of the reactants

(d) a, b, and c are all correct

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Textbook Question

Which of the following chemical equations illustrates a typical decomposition reaction?

a. A + B → AB

b. AB + CD → AD + CB

c. 2A₂+ B₂ → 2A₂B

d. AB → A + B

Textbook Question

The number and arrangement of electrons in an atom's outer energy level (valence shell) determine the atom's

(a) Atomic weight

(b) Atomic number

(c) Molecular weight

(d) Chemical properties

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