Exam 12: Solids and Modern Materials

The process of adding controlled amounts of impurity atoms to a material is known as ________.

Inorganic compounds that are semiconductors have an average of ________ valence electrons.

Sterling silver is ________.

Which one of the following is a property of most metals?

The type of solid that is characterized by low melting point, softness, and low electrical conduction is a covalent-network solid.

Which statement about steel is false?

As a polymer becomes more crystalline, ________.

24 karat gold contains ________% gold.

A solid has a very high melting point, great hardness, and poor electrical conduction. This is a(n)________ solid.

Vulcanization involves heating rubber with sulfur dioxide to produce a thermosetting polymer.

Semiconductor particles with diameters of 1-10 nm are called ________.

In addition to differences in their average molecular mass, HDPE and LDPE differ in their degree of ________ and their ________ of the chains.

When lattice points occur at the center of each face, as well as each corner of a unit cell, the cell is called ________.

The dopant atoms in an n-type semiconductor have ________ electrons than the host material.

Which element is typically not added to steel to modify its properties?

The ________ lattice is one of the seven primitive three-dimensional lattices in which the relationship between the lattice vectors a, b, and c can be written as: a ≠ b ≠ c

Which one of the following is an addition polymer with the same structure as polyethylene except that one hydrogen on every other carbon is replaced by a benzene ring?

Nylon is formed by the reaction of a(n)________ with a(n)________.

NaCl crystallizes in a face-centered cubic cell. What is the total number of ions (Na⁺ ions and Cl^- ions)that lie within a unit cell of NaCl?

When lattice points occur only at the corners of a unit cell, the cell is called ________.