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Density of lithium atom is 0.53 g//cm^(3...

Density of lithium atom is 0.53 `g//cm^(3)`. The edge length of Li is `3.5 Å`.The number of lithium atoms in a unit cell will be……….. .
(Atomic mass of lithium is 6.94)

A

2

B

1

C

4

D

6

Text Solution

Verified by Experts

The correct Answer is:
A
`d=(ZxxM)/(N_Axxa^3)`
`Z=(a^3 xx d xx N_A)/(M)`
`Z=((3.5xx10^(-8))^3 xx0.53xx6.023xx10^23)/6.94=1.97 approx 2`
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