In which direction along the periodic table does thermal conductivity generally increase?

Q: In solid CsCl, the coordination numbers of the Cs and Cl ions are, respectively: Select one: O 6 and…

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Q: What do amorphous forms of graphite include?

A: What do amorphous forms of graphite include has to be given.

Q: What are the two types of layer arrangement in metals? Which has the closer packing?

A: The two types of layer arrangement in metals are : Simple Squares Hexagonal Layer   Simple squares…

Q: Q3. Calculate the theoretical density for Zinc of HCP crystal structure, the atomic mass = 65.38…

A: The density of zinc can be calculated by using given formula

Q: calculate the ionic attractive energy between K and O ions per mol of the material.

A: Between  K+ and O2-  ionic bond is formed. Ionic bonds are formed when positively and negatively…

Q: Which of these molecular fragments would you expect tobe more likely to give rise to electrical…

A: Electrical conductivity depends upon flow of electrons or charge separation.

Q: Amorphous silica, SiO2, has a density of about 2.2 g/cm3,whereas the density of crystalline quartz,…

A: Option (e). Crystalline solids are the one in which atoms are arranged in an orderly repeating…

Q: What is the best description of conductivity? Select one: O The amount of electricity present in a…

A: Conductivity of a substance is the degree to which electricity passes through substance.

Q: A liquid rises to a height of 1.50 cm in a capillary tube. What is the radius of the tube if the…

A: The liquid rises and falls in a capillary tube due to the forces of adhesion and cohesion. The…

Q: Which allotrope of sulphur is thermally stable at room temperature?

A: Sulfur exists in various allotropes. The most important among them are: Rhombic Sulfur (α-sulfur)…

Q: What allows graphite to conduct electricity?

A: Graphite is the most stable allotrope of Carbon. It is the only non-metal that conducts electricity.…

Q: How does crystallinity affect the mechanical properties of materials.

A: Crystallinity affects the mechanical properties of materials. The thermal performances and…

Q: Why are isotactic or syndiotactic polymers often more attractive for materials development?

A: An isotactic polymer is a compound that is formed by the arrangement of monomers in the same pattern…

Q: Why does water form a concave lens in a test tube, whereas mercury forms a convex lens.

A: To find: Why does water form a concave lens in a test tube, whereas mercury forms a convex lens.

Q: MCQ 2: A very small amount of electrical conductivity is measured in A. silicon (Si) only B.…

A: We know that the semiconductors are used to measure the electrical conductivity and silicon and…

Q: Use the hybridization and structures of graphite and diamond to explain why graphite conducts…

A: The objective of the question is to explain the reason behind the good electrical conductivity of…

Q: What is the molecular formula of the compound represented by the unit cell below? Xenon Fluorine

A: The smallest repeating unit with full symmetry of crystal structure is known as unit cell.

Q: What do granite and basalt have in common?

A: Granite and Basalt are two of the major rocks found in the earth crust.

Q: What are the number of crystalline allotropes of carbon?

A: Properties of some chemical elements to exist in two or more different forms, in the same physical…

Q: Predict the effect (if any) of a decrease in temperature on the electrical conductivity of (a)…

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Q: (d) In Covalent-solids and ionic-solids, whose electrical conductivity will be higher? Why?

A: Since you've posted multiple questions, we'll solve only the first question for you. If you want any…

Q: At room temperature, the edge length of the cubic unit cell in elemental silicon is 5.431 Å, and the…

A: The crystal lattice is a definite ordered structure. A lattice is an arrangement of particles in a…

Q: >Explain why the viscosity of liquid sulfur increases with increasing temperature initially, but…

A: The liquid S viscosity increases as temperature increases initially but on further temperature it…

Q: How does the sea-of-electrons model explain the high electrical conducitivity of gold ?

A: Metallic bonding is a type of chemical bonding, the cations in the metal are surrounded by many…

Q: The type of interaction formed between carbon tetrachloride and iodine crystals

A: Carbon tetrachloride is colorless liquid with sweet smell. It features four non polar covalent bonds…

Q: #17. arrange the following pure solid elements in order of increasing electrical conductivity.

A: The electrical conductivity is determined by the ease with which the electric current can be passed…

Q: How do atomic radius ratios relate to strength in alloys?

A: The smaller the atomic radius, the more influence the nucleus has on reactivity. Since the nucleus…

Q: Unit cell) calculate atomic radius in picometers; not sure how to get volume or side length if I…

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Q: determine the type of the structure (FCC or BCC) if the radius of normal atom is 0.1263nm and…

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Q: Why Graphite is more compressible than diamond ?

A: Diamond and graphite are allotropes of carbon. The similarity between the two is the constituent…

Q: Why does graphite conduct electricity?

A: Graphite is an allotrope of carbon. It is a covalent solid. It has a trigonal planar geometry. The…

Q: -Within a cubic unit cell, sketch the following directions: a) [101); b) [211} c) [313]

A: a)

Q: In the hexagonal layer structure of Graphite, each carbon is bonded to four carbon neighbor atoms

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Q: Explain why graphite can conduct electricity, but diamond does not.

A: The reason is as follows,

Q: 5. Consider the properties of four substances (A, B, C and D) in the following table. Substance A B…

A: Given table is :  Consider the properties of the four substances, which substance is most likely…

Q: Simple cubic a - R relationship Number of atoms/cell APF Coordination Number

A:

Q: Introduction of carbon into a metallic lattice generally resultsin a harder, less ductile substance…

A: Introduction of carbon into a metallic lattice generally results in a harder , less ductile…

Q: What is a polymorph?

A: Polymorphism is the concept of Material Science which is about the ability of a solid material…

Q: Estimate the density of calcium oxide (rock salt structure), knowing that the ion rays are 100 pm…

A: Radius of Ca2+ = 100 pm Radius of O2- = 140 pm CaO has rock salt structure, i.e. Z =4 Calculation of…

Q: Why does conductivity of silicon increase with the rise in temperature.

A: The conductivity of silicon increases with the rise in temperature.

Q: An ionic solid, MX, has the ionic radius ratio, r,/r., of more than 0. 0.732. Calculate the anionic…

A: We know that the radius ratio is the ratio of cation to the ratio of anion.  Here, r+ = Ratio of…

Q: Predict the effect (if any) of an increase in temperature on the electrical conductivity of (a)…

A: The three elements given are – Antimony Tellurium Bismuth

Q: Sketch within a cubic unit cell the following planes: (а) (101) (e) (111) (b) (2Ī1) _M (212)

A: