Modern periodic law (1913) was based on the X-ray spectra of Henry Moseley equation. Read the follow

Question

Modern periodic law (1913) was based on the X-ray spectra of Henry Moseley equation. Read the following data and select the incorrect option. \ $\sqrt{v}=a(Z-b)$, where $a$ and $b$ are constants. If $O A =1$, then element showing frequency of 225 Hz , belongs to\

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(b) : $\sqrt{v}=a Z-a b$ Thus, represents a straight line equation, $y=m x+(-c)$\ Comparing straight line equation with (i)\ $y($ slope $)=a=	an 45^{\circ}$\ Thus, $a=1$\ Also, when $\sqrt{v}=0, a Z=a b$\ $Z=O A=b=1$\ Putting the values of $\mathrm{a}, \mathrm{b}$ and $v$ in eq.(i)\ $\sqrt{225}=Z-1 \Rightarrow Z=16$\ Electronic configuration of atomic number, $16=1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{4}$\ Thus, it is $p$-block element thus, option (a) is correct.\ It is non-metal, hence option (c) is correct.\ Group $=16$, valence electrons $=6$\ Period = 3, thus, option (d) is correct and option (b) is incorrect.\