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A substance 'A' crystallizes in fcc latt...

A substance 'A' crystallizes in fcc lattice.
Calculate the number of atoms present per unit cell of 'A'.

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Density of a unit cell is the same as the density of the substance. So, if the density of the substance is known, we can calculate the number of atoms or dimensions of the unit cell. The density of the unit cell is related to its formula mass (M), number of atoms per unit cell (z), edge length (a in cm), and Avogadro's constant N_(A) , as rho=(zxxM)/(a^(3)xxN_(A)) Q. An element X crystallizes in a structure having an fcc unit cell of an edge 100 pm. if 24 g of the element contains 24xx10^(23) atoms, the density is

BODY BOOKS PUBLICATION-THE SOLID STATE-EXAMPLE
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  9. Account for the following : The electrical conductivity of a metal ...

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  10. NaCl does not exhibit frenkel defect. Do you agree? Justify.

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  11. Assumes that a fresh piece of KCI crystal is heated in an atmosphere o...

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  12. Consider a FCC crystal lattice with anions ‘Q’. If half of the octahed...

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  13. A metalic element crystallizes into a lattice containing a sequence of...

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  14. A metalic element crystallizes into a lattice containing a sequence of...

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  15. A metalic element crystallizes into a lattice containing a sequence of...

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  16. Some solids are given below. Water, Brass, Quartz, Calcium fluoride. ...

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  17. Explain tetrahedral void in close packing.

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  19. Explain the following terms with suitable examples: i. Schottky defect...

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