Copper crystallises in fcc with a unit length of $361\,pm$. What is the radius of copper atom ?
- 157 pm
- 128 pm
- 108 pm
- 181 pm
The Correct Option is B
Solution and Explanation
$r=\frac{\sqrt{2}a}{4}=\frac{a}{2 \sqrt{2}}=0.3535 a$
given $a = 361 \,pm$
$r=0.3535 \times361$
$= 128 \,pm$
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Types of Solids:
Based on the nature of the order that is present in the arrangement of their constituent particles solids can be divided into two types;
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- Crystalline solids have a fixed shape and the constituent particles are arranged in a long-range order.
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