Ch.12 - Solids and Modern Materials

Brown - Chemistry: The Central Science 14th Edition

Brown14th EditionChemistry: The Central ScienceISBN: 9780134414232Not the one you use?Change textbook

Brown 14th Edition

Ch.12 - Solids and Modern Materials

Problem 45c

Chapter 12, Problem 45c

Indicate whether each statement is true or false: (c) Nonmetallic elements are never found in alloys.

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Understand the definition of an alloy: An alloy is a mixture of metals or a mixture of a metal and another element.

Recognize that nonmetallic elements can be part of an alloy: Nonmetallic elements such as carbon, silicon, phosphorus, and others can be incorporated into alloys to enhance their properties.

Consider common examples: Steel is an alloy of iron and carbon, where carbon is a nonmetallic element.

Analyze the statement: The statement claims that nonmetallic elements are never found in alloys, which contradicts the examples where nonmetallic elements are indeed part of alloys.

Conclude the truth value: Based on the understanding and examples, determine whether the statement is true or false.

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Key Concepts

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

Nonmetals and Alloys

Nonmetals are elements that typically lack the properties of metals, such as conductivity and malleability. Alloys are mixtures of two or more elements, where at least one is a metal. While nonmetals are not commonly found in traditional metallic alloys, they can be present in certain specialized alloys, such as those used in semiconductors or specific chemical applications.

Properties of Alloys

Alloys are designed to enhance specific properties such as strength, corrosion resistance, or ductility. The inclusion of nonmetals can modify these properties, leading to improved performance in certain applications. For example, carbon is a nonmetal that is a key component in steel, significantly increasing its strength.

True or False Statements in Chemistry

In chemistry, evaluating statements as true or false often requires understanding the definitions and characteristics of the elements or compounds involved. This involves critical thinking and knowledge of chemical principles, such as the behavior of nonmetals and their interactions with metals in various contexts, including alloys.

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Related Practice

Textbook Question

State whether each sentence is true or false: (a) Metals have high electrical conductivities because the electrons in the metal are delocalized. (c) Metals have large thermal conductivities because they expand when heated. (d) Metals have small thermal conductivities because the delocalized electrons cannot easily transfer the kinetic energy imparted to the metal from heat.

Textbook Question

For each of the following alloy compositions, indicate whether you would expect it to be a substitutional alloy, an interstitial alloy, or an intermetallic compound: (a) Fe_0.97Si_0.03 (b) Fe_0.60Ni_0.40 (c) SmCo₅.

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Textbook Question

Which element or elements are alloyed with gold to make the following types of 'colored gold' used in the jewelry industry? For each type, also indicate what type of alloy is formed: (c) green gold.

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Textbook Question

An increase in temperature causes most metals to undergo thermal expansion, which means the volume of the metal increases upon heating. How does thermal expansion affect the unit cell length? What is the effect of an increase in temperature on the density of a metal?

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