The unit cell of Na is bee and its density is
0.97 g/cm3. What is the radius of a sodium
atom if the
molar mass of ra is 23 g/mol
Answers
Answered by
1
Explanation:
Density (D), number of atoms per unit cell (Z), atomic mass (M), Avogadro's number (N
0
) and edge length (a) are related as below:
D=
N
0
a
3
ZM
Given D=8.55 g/cm
3
and M=93 u.
Edge length =a=(
DN
0
ZM
)
1/3
=(
8.55×6.023×10
23
2×93
)
1/3
=3.306×10
−8
cm
Atomic radius =r=
4
3
a=
4
3
×3.306×10
−8
=1.432×10
−8
cm=14.32 nm
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