An element crystallizes in fcc lattice with edge of 300pm.The density
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density =mass per unit area.
d= m/v.
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For fcc
z=4z=4
N=24×1023N=24×1023 atoms
a=200a=200 pm
=200×10−10=200×10−10pm
=2×10−8=2×10−8 cm
d=z×Ma3×Nd=z×Ma3×N
=4×2008×10−24×24×1023=4×2008×10−24×24×1023
=100024=100024
=41.67gcm−3
this might be a good example
z=4z=4
N=24×1023N=24×1023 atoms
a=200a=200 pm
=200×10−10=200×10−10pm
=2×10−8=2×10−8 cm
d=z×Ma3×Nd=z×Ma3×N
=4×2008×10−24×24×1023=4×2008×10−24×24×1023
=100024=100024
=41.67gcm−3
this might be a good example
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