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A metal (M), crystallizes in $\text{fcc}$ lattice with edge length of $4.242 \text{ \AA}$. What is the radius of $\text{M}$ atom (in $\text{\AA}$)?

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Remember the geometric relations for cubic unit cells: - $\text{fcc}$: Atoms touch along the face diagonal: $4r = a\sqrt{2}$. - $\text{bcc}$: Atoms touch along the body diagonal: $4r = a\sqrt{3}$. - $\text{sc}$: Atoms touch along the edge: $2r = a$.

Updated On: Mar 30, 2026

1.25
1.75
1.5
1.0

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The Correct Option is C

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A metal (M), crystallizes in $\text{fcc}$ lattice with edge length of $4.242 \text{ \AA}$. What is the radius of $\text{M}$ atom (in $\text{\AA}$)?

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The Correct Option is C

Solution and Explanation

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