Sodium metal (atomic weight 22.99 g/mol) adopts abody-centered cubic structure with a density of 0.97 g/cm3.(a) Use this informat ion and Avogadro’s number1NA = 6.022 x1023/mol2 to estimate the atomic radius ofsodium. (b) If sodium didn’t react so vigorously, it couldfloat on water. Use the answer from part (a) to estimatethe density of Na if its structure were that of a cubic closepackedmetal. Would it still float on water?

Q: sdaswTantalum is a rare, hard, blue-gray, lustrous transition metal that is highly…

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Q: Define the following:(i) Primitive unit cell (ii) Schottky defect (iii)Ferromagnetism.

A: Step : 1           Define the following terms :

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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.