For a simple cubic crystal,the edge length is | vedclass

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Question

(A) In a simple cubic unit cell,the atoms are present only at the corners of the cube.These atoms touch each other along the edge of the cube.Let '$a$

Vedclass · Accepted Answer

$a=2r$

Vedclass · Answer

(A) In a simple cubic unit cell,the atoms are present only at the corners of the cube.These atoms touch each other along the edge of the cube.Let '$a$' be the edge length of the unit cell and '$r$' be the radius of the atom.Since the atoms touch along the edge,the edge length '$a$' is equal to the sum of the radii of the two touching atoms.Therefore,$a = r + r = 2r$.

For a simple cubic crystal,the edge length is expressed as:

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