What is the difference between a crystalline and amorphous material? Don't use chatgpt or other ai tool. If you know correct answer then attempt if you gave wrong answer I will give 10. dislikes and more from my friends account
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- Please do all parts if possible, I dont need explanation just answer, Thank you: TRUE OR FALSE: a) Glasses are usually harder than plastics but softer than silicon carbide and boron carbide b) Any amorphous (lacking in long-range periodic order) materials, inorganic, organic, or metallic, formed by any techniques, exhibits glass transformation formation behavior are glasses c) In general, the viscosity is low at the melting position of glass, and high at room temperature. d) In general, if the viscosity is very high at the melting position of the corresponding crystalline phase which would form the melt, it is much easier to form glass for this melt. e) The glass fiber is possible to have a tensile strength even larger than that for iron or structural steel. Therefore, in the practical applications, we should be able to use glasses for the same purposes of the iron or structural steel.Imagine the primitive cubic lattice. Now imagine pushingon top of it, straight down. Next, stretch another face bypulling it to the right. All angles remain 90°. What kind ofprimitive lattice have you made?please answer letter b. Please help. Tysm❤️B. Choose one type of solid (metallic crystals, ionic crystals, molecular crystals, and covalent network crystals) and analyse explain in two sentences why it has these properties (strength or hardness, melting point, electrical conductibility, heat conductibility, and brittleness). Example: Metallic crystals have high melting point because a large amount of energy is needed to melt the crystal since the forces of attraction to be broke are numerous and extend throughout the crystal.
- 5..Generally we add n-buLi to halogen for lithiation but sometimes addition of halogen to n-BuLi also observed,what is logic in reverse additionDerive the dimension ratio c/a for regular HCP crystal. Note: Do not use the atomic packing factor.A crystal has a cubic unit cell of 4.2 Å. Using a wavelength of 1.54 Å at which 2θ value would you expect tomeasure the (111) peak?
- A certain element has an atomic radius of 0.193 nm and forms a cubic unit structure with a side of 0.386 nm. What is it's geometry? Show solutionComparing two FCC metals, one with melting temperature of 857 ºC and one with melting temperature = 1284 ºC, which would you expect to have a larger fraction of vacant sites (Nv/N) at a temperature one degree below their respective melting points? Write down answer in about 4 sentences, and include all relevant quantities to make your point.4.) Carbon and graphite are allotropes of Carbon. Between graphite and diamond, which one is a good conductor of electricity and which one is not? Support answer with an explanation. (Limit answer to not more than 4 sentences)
- Beryllium (ionic radius 45 pm) and Sulfide (ionic radius 184 pm) form an ioniccompound. Assuming the anions form a cubic close packed, face centeredcubic array, answer the following.R+/R0.225 – 0.414 Tetrahedral0.414 – 0.732 Octahedral> 0.732 Cubica) Z anions =b) Hole type for cationsc) Z cations =d) What fraction of holes are filledwhat is the plain of the closest packing of FCC and BCC?A solid dubstance has a moderate melting point, is fairly soft, and is a nonconductor. This subustance is probaly a(n) __________solid. Metalic Ionic Network Nonpolar molecular Polar molecular