The element which has a \[{{K}_{\alpha }}\] x-rays line of wavelength – McqOptions

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1.	The element which has a \[{{K}_{\alpha }}\] x-rays line of wavelength 1.8 A is (\[R=1.1\times {{10}^{-7}}{{m}^{-1}},b=1\] and \[\sqrt{5/33}=0.39\])
A.	Co, Z=27
B.	Iron, Z=26
C.	Mn, Z=25
D.	Ni, Z=28
Answer» B. Iron, Z=26

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