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Ch. 2 The Chemical Level of Organization
Martini - Fundamentals of Anatomy & Physiology 12th Edition
Martini, Nath, Bartholomew12th EditionFundamentals of Anatomy & PhysiologyISBN: 9780137854011Non è quello che usi tu?Cambia libro di testo
Tutti i libri di testoMartini, Nath, Bartholomew 12th EditionCh. 2 The Chemical Level of OrganizationProblema 7
Capitolo 2, Problema 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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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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Classes of MHC Molecules

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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Introduction to Chemical Bonding

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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2:07
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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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Domanda del libro di testo

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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Domanda del libro di testo

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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Domanda del libro di testo

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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Domanda del libro di testo

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

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Domanda del libro di testo

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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