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3. Classification of elements and periodicity in properties — Chemistry STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceChemistry3. Classification of elements and periodicity in properties1 Mark
MCQ
It is observed that characteristic X-ray spectra of elements show regularity. When frequency to the power ' $n$ ' i.e. $v^{ n }$ of X-rays emitted is plotted against atomic number ' $Z$ ', following graph is obtained. The value of ' $n$ ' is
  • A
    $1$
  • B
    $2$
  • ✓
    $0.5$
  • D
    $3$
✓

Answer

Correct option: C.
$0.5$
c
According to Henry Moseley $\sqrt{v}\,\alpha z - b$

So $n =\frac{1}{2}$

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