Question

what is the radius of iodine atoms atomic number 53 mass number 126
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Answer 1

Answer:

53 electrons in iodine atom are distributed as 2,8,18,18,7

.''. n = 5

Answer 2

Radius of iodine atoms

Explanation:

iodine atom ,

electronic configuration= 2,8,18,18,7

Quantum no. (n) = 5

atomic no. (Z) = 53

radius ($r_n}$) = ?

formula for calculation of radius is $r_{n}$ = (0.53 x $10^{-10}$)$\frac{n^{2} }{Z}$

hence, $r_n}$ = (0.53x$10^{-10}$)$\frac{5^{2} }{53}$

$r_{n}$ =$\frac{ 0.53 *10^{-10} * 5^{2} }{53}$

$r_{n}$ = 2.5 * $10^{-11}$ m

So, the radius of iodine atoms = 2.5* $10^{-11}$ m .