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Chapter 12: Problem 17

(a) Draw a picture that represents a crystalline solid at the atomic level. (b) Now draw a picture that represents an amorphous solid at the atomic level.

Short Answer

Expert verified
To draw a crystalline solid, create a lattice of repeating squares, with circles representing atoms at the intersections. For an amorphous solid, draw randomly scattered circles of different sizes with no repeating pattern, but close enough to show solid connections between them.

Step by step solution

01

Drawing Crystalline Solid

To draw a crystalline solid, start by drawing a lattice, which is a repeating pattern of points. First, draw a square and then draw another square of the same size within it, offset such that the vertices of the inner square are at the middle points of the outer square's sides. Now, draw lines connecting the vertices of both squares. Place a circle representing an atom at each intersection. The repeating pattern of atoms in a crystalline solid is represented by the lattice.
02

Drawing Amorphous Solid

To draw an amorphous solid, begin by drawing several circles of different sizes, representing atoms, scattered randomly on the paper. The lack of uniformity mimics the amorphous structure. Make sure that the circles are somewhat close together, as there still needs to be a solid connection between the atoms. The lack of a repeating pattern and the irregular arrangement of the atoms represent the amorphous structure.

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Most popular questions from this chapter

If you want to dope GaAs to make an n-type semiconductor with an element to replace Ga, which element(s) would you pick?

Explain why \(\mathrm{X}\) rays can be used to measure atomic distances in crystals but visible light cannot be used for this purpose.

A white substance melts with some decomposition at \(730^{\circ} \mathrm{C}\). As a solid, it does not conduct electricity, but it dissolves in water to form a conducting solution. Which type of solid (molecular, metallic, covalent- network, or ionic) might the substance be?

Classify each of the following statements as true or false: (a) Although both molecular solids and covalent-network solids have covalent bonds, the melting points of molecular solids are much lower because their covalent bonds are much weaker. (b) Other factors being equal, highly symmetric molecules tend to form solids with higher melting points than asymmetrically shaped molecules.

Indicate whether each statement is true or false: (a) The band gap of a semiconductor decreases as the particle size decreases in the 1-10-nm range. (b) The light that is emitted from a semiconductor, upon external stimulation, becomes longer in wavelength as the particle size of the semiconductor decreases.
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