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The $K_{α}$ X-rays arising from a cobalt (z : 27) target have a wavelength of 179 pm. The $K_{α}$ X-rays arising from a nickel target (z = 28) is

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> 179 pm

< 179 pm

= 179 pm

None of these

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detailed solution

Correct option is B

λkα∝1Z−12⇒λNiλCo=ZCo−1ZNi−12=27−128−12⇒lNi=26272×λCo=26272×179=165.9pm<179pm

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The Kα X-rays arising from a cobalt (z : 27) target have a wavelength of 179 pm. The Kα X-rays arising from a nickel target (z = 28) is

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Ready to Test Your Skills?

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The $K_{α}$ X-rays arising from a cobalt (z : 27) target have a wavelength of 179 pm. The $K_{α}$ X-rays arising from a nickel target (z = 28) is