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The metal potassium crystallizes in a body-centered cubic lattice. If the radius of potassium is 227 pm, what is the unit cell edge length?

A. 524 pm
B. 454 pm
C. 303 pm
D. 227 pm
E. 98.3 pm

Answer :

Final answer:

The unit cell edge length for a potassium atom in a body-centered cubic lattice is 524 pm. This is calculated using the formula a = 4r/sqrt(3), substituting the given radius of 227 pm. Therefore, the correct option is A

Explanation:

In body-centered cubic (bcc) lattice structures, the unit cell edge length 'a' is related to the radius 'r' of the atom by the equation a = 4r/sqrt(3). Given that the radius of potassium is 227 pm, you can substitute this value into the equation to find the edge length.

By mathematically solving, a = 4 x 227 pm / sqrt(3) = 524 pm.

You can confirm this is correct by noting that the option 'a. 524 pm' is available in the choices provided. So, the unit cell edge length for a potassium atom in a body-centered cubic lattice is 524 pm.

Learn more about Body-Centered Cubic Lattice here:

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