Calcium fluoride forms a crystalline lattice in fluorite. The calcium ions are the darker spheres in the unit cell shown. Choose the best description of the packing of the calcium ions.

Q: Magnesium oxide (MgO) has a NaCl type crystal structure. The ionic radii of Mg2+ and O2- ions are…

A: NaCl have FCC lattice.

Q: Explain how you can determine the atomic mass of an unknown metal if you know its mass density and…

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Q: Indium has a tetragonal unit cell for which the a and c lattice parameters are 0.459 and 0.495nm,…

A: Given: lattice parameters : a = 0.459 nm  c = 0.495 nm    atomic packing factor =  0.693 atomic…

Q: BaS crystallizes in a cubic unit cell with S 2- ions on each corner and Ba 2+ on each face. How many…

A: The BaS crystallizes in a cubic unit cell where the S2- ions are present on the corners of the cubic…

Q: The mineral perovskite has a calcium atom at each corner of the unit cell, a titanium atom at the…

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Q: A new material crystallizes in the face-centered cubic unit cell. The molar mass of the material is…

A:

Q: Assume some metal that has a body-centered cubic lattice with all atoms at lattice points. Its…

A: In a body centered unit cell one atom exist in the center and eight 1/8 atom lies in the corner of…

Q: A compound contains three elements: sodium, oxygen, and chlorine. It crystallizes in a cubic…

A: In the problem formula of a compound has to be in primitive cubic lattice with oxygen, chlorine and…

Q: Metal has an atomic radius of 177.76 pm and a cell unit length of 503 pm. What is its unit cell…

A: Given, Atomic radius of metal (r) = 177.76 pm Unit length (a) = 503 pm Unit cell arrangement = ?…

Q: 4. Chromium crystallizes with a body-centered cubic unit cell. The radius of a chromium atom is 125…

A: Density of a lattice is calculated using the following formula ρ=zMNa3 Where ρ=density M=atomic…

Q: Not all unit cells have a cubic structure. Take for example the below image wherein the unit cell…

A: Given: One atom at each corner one central atom at each of the bases, one atom at the center of the…

Q: A unit cell must be electrically neutral. What is the charge on the oxygen ion assuming it has a…

A: Unit cell is basic unit of a lattice that must be electrically neutral.

Q: Aluminum crystallizes in the face-centered cubic system and the edge of the unit cell is 405 pm.…

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Q: Why do covalent and molecular crystals typically have a much lower packing density than metal…

A: Covalent crystal have much Lower density than metal crystal.

Q: Barium has a density of 3.59 g/cm? and crystallizes with the body-centered cubic unit cell.…

A: The density of  Barium D is calculated as:                             D=ZMN∘a Z is the number of…

Q: A hypothetical element crystallizes with a BCC unit cell. Its density is 5 g/cm3 and its molecular…

A: Given data,  Density of element = 5 g/cm3 Molecular weight of element = 235 g/mol  For a BCC unit…

Q: ) NaCl crystallizes in a cubic unit cell with Cl- ions on each corner and each face. Howmany Na+ and…

A: The number of Na+ and Cl- ions are in each unit cell of NaCl is to be calculated

Q: Nickel crystallizes in face center cubic unit cell. What is the atomic radius of nickel if the…

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Q: Define crystal lattice and unit cell.

A: Lattice is a collection of lattice points that are arranged in a periodic pattern so that the…

Q: Calcium fluoride forms a crystalline lattice in fluorite. The fluoride ions are the lighter spheres…

A: Given, CaF2 adopts Fluorite structure.

Q: Chromium has a structure with two atoms per unit cell. Is the structure of this metal simple cubic,…

A: Unit cell is the primary unit of crystal lattice that repeats it to form whole lattice. Unit cells…

Q: The density of Cr is 7.20 g cm3, It its unit cell is a cube with an edge length of 0.289 nm,…

A: Given, Density = 720gcm-3 Edge length(a) = 0.289nm = 0.289×10-9m = 0.289×10-7cm For Cr molar mass(m)…

Q: Aluminum crystallizes in FCC arrangement, Potassium forms BCC structure and Polonium follows an SCC…

A: Coordination number(C.N) is the number of nearest neighbouring atoms/ ions to the atom. FCC has C.N…

Q: Given that the edge length of an FCC unit cell is 674.0 pm, determine the radius of the atoms which…

A: Cyrstal lattice is the three dimensional arrangement of atoms in a crystal. The lattice can be of…

Q: Simply explain ‘unit cell’. Name and draw the three subtypes of cubic unit cells. Describe their…

A: Smallest repeating unit of space lattice is called unit cell. They are characterized by their…

Q: Strontium forms a face centered cubic unit cell and has a density of 2.64 g/cm3. What is the radius…

A: Given - Strontium with FCC unit cell and density is of 2.64 g/cm3  Then from following formula -  d…

Q: Calcium sulfide has a face-centered cubic unit cell with sulfide ions in octahedral holes. Remember,…

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Q: How many atoms are assigned to each unit cell of Hexagonal Close-Packed Crystal Structure?

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Q: What is a crystalline lattice? How is the lattice represented with the unit cell?

A: Lattice is a collection of lattice points that are arranged in a periodic pattern so that the…

Q: Scandium forms a body-centered cubic unit cell and has a density of 22.99 g/cm^3. From this…

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Q: What are the Cubic unit cells?

A: The smallest part of a crystal that shows a 3-D pattern of the entire crystal is defined as a unit…

Q: Molybdenum crystallizes with the body- centered unit cell. The radius of a Mo atom is 136 pm.…

A: (a)Determine edge length of the unit cell:

Q: Consider an alloy of copper and gold with the  structure shown here: a) What is the volume (cm3) of…

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Q: When a particular substance crystallizes, it forms a simple cubic unit cell. It has a molecular…

A: The density can be determined from the formula-

Q: Describe the characteristic feature of a unit cell?

A: Unit cell: The smallest repeating unit of a crystal lattice is called a unit cell.…

Q: A metal has an HC crystal structure, a density of 6g/cm3, and an atomic weight of 36g/mol. What is…

A: For HC crystal structure ., Z = 6 Molar mass of metal = 36 g/mol Density of metal = 6 g/cm3 we know…

Q: Molybdenum crystallizes with the body-centered unit cell. The radius of a molybdenum atom is 136 pm.…

A: Determine edge length of the unit cell:

Q: What is the coordination number of an atom in a face-centered unit cell?

A: The coordination number of face-centered unit cell has to be given,

Q: Besides the cubic unit cell, which other unit cell(s) has edgelengths that are all equal to each…

A: Apart from the cubic rhombohedral and trigonal lattice has all edge length same as shown below…

Q: Calcium sulfide has a face-centered cubic unit cell with sulfide ions in octahedral holes. Assume…

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Q: Rhodium has a density of 12.41 g/cm3 and crystallizes with the face-centered cubic unit cell.…

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Q: The density of palladium (Pd) is 12.0 g/mL and the cell volume is 5.89 ✕ 10−23 mL. Determine the…

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Q: A crystalline form of molybdenum has a face centered cubic structure. If the radius of a molybdenum…

A: The density of unit cell is given by : density =Z ×Ma3×NA Here, M = molar mass NA = Avogadro’s…

Q: A metal has atoms with a radius of 180.7 pm. It crystallizes in a simple cubic unit cell. The molar…

A: Given the radius of the metal atom, r = 180.7 pm Given the crystal lattice of the metal is simple…

Q: A metal crystallizes in a face-centered cubic lattice. The radius of the atom is 196 pm and the…

A: Given that,  Metal crystallizes in a face-centered cubic lattice.  Radius of the atom (r) = 196 pm…

Q: The unit cell of MgO is shown below   Does MgO have a structure like that of NaCl or ZnS? If the…

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Crystal Lattices and Unit Cell

Consider a crystal. The regular and repeating pattern of constituent particles is the most distinguishing feature of crystalline solids. A crystal lattice is formed when these particles are replaced with representative points. The three-dimensional arrangement of constituent particles is known as a crystal lattice. Unit cell is that the smallest portion of a space lattice which when repeated in several directions, generate the whole lattice. Unit cell is a building block of a lattice. It is the smallest unit of cell.