Which of the following properties are typical characteristicsof a covalent-network solid, a metallic solid, or both:(a) ductility, (b) hardness, (c) high melting point?

Q: Of the five major types of crystalline solid, which does each of the following form, and why: (a)…

A: ANSWER

Q: Define the term body-centered cubic lattice?

A: Lattice is a part of crystal, which is a 3D arrangement of atoms, molecules, or ions. Furthermore,…

Q: CdS has a band gap of 2.4 eV. If large crystals of CdS are illuminatedwith ultraviolet light, they…

A: a. Hence, the wavelength of light corresponds to the given band gap is 517 nm . This wavelength…

Q: Which solid would you expect to have the highest melting point?(a) MgO(s) (b) I2(s) (c) Kr(s)?

A: The melting point of a substance depends upon the type of bonds present in the substance. If there…

Q: CuI, CsI, and NaI each adopt a different type of structure.The three different structures are those…

A: Given   The ionic radii of Cs+ = 1.81 A°  The ionic radii of Na+ = 1.16 A°   The ionic radii of Cu+…

Q: Silicon has a band gap of 1.1 eV at room temperature.(a) What wavelength of light would a photon of…

A: As your question consists of multiple subparts, we are solving only the first two, to then get the…

Q: How many molecular orbitals are present in the valence band of a sodium crystal with a mass of 5.45…

A: The number of sodium atom in a sodium crystal with a mass of 5.45 g is calculated as shown below.…

Crystal Structures

Solids are present all around us. They have different properties and applications. Diamond and graphite are two well-known solids. Diamond is the hardest material in the world and is used in making jewelry. Graphite on the other hand is soft. The lead of your pencil is graphite. Why are they so different in appearance and properties despite the fact they are chemically the same? Both are allotropes of carbon. The answer lies in the structure, the way constituent particles are arranged in the solids.