The wavelength of Kα line in copper is $$1.54$$ Ao. The ionisation energy of K electron in copper in Joule is

Correct option is 212.9×10−16

Questions

The wavelength of $K_{α}$ line in copper is 1.54 $\overset{o}{A}$ . The ionisation energy of K electron in copper in Joule is

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11.2×10−27

12.9×10−16

1.7×10−15

10×10−16

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detailed solution

Correct option is B

Required ionisation energy =hcλ=6.6×10−34×3×1081.54×10−10J=12.9×10−16J

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The wavelength of Kα line in copper is 1.54 Ao. The ionisation energy of K electron in copper in Joule is

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The wavelength of $K_{α}$ line in copper is 1.54 $\overset{o}{A}$ . The ionisation energy of K electron in copper in Joule is