The element which has a `K_(alpha)` X-rays line of wavelength `1.8 Å` is `(R = 1.1 xx 10^(7) m^(-1), b = 1 and sqrt(5//33) = 0.39)`A. `C o, Z = 27`B. `Iron, Z = 26`C. `M n, Z = 25`D. `N i, Z = 28`

The element which has a `K_(alpha)` X-rays line of wavelength `1.8 Å`

1.	The element which has a `K_(alpha)` X-rays line of wavelength `1.8 Å` is `(R = 1.1 xx 10^(7) m^(-1), b = 1 and sqrt(5//33) = 0.39)`A. `C o, Z = 27`B. `Iron, Z = 26`C. `M n, Z = 25`D. `N i, Z = 28`
Answer» Correct Answer - A `(1)/(lambda_(alpha)) = (3R)/(4) (Z - 1)^(2)` `(Z - 1) = sqrt((4)/(3 R lambda_(alpha))) = sqrt((4)/(3 xx 1.1 xx 10^(7) xx 1.8 xx 10^(-10)))` `= (200)/(3) sqrt((5)/(33)) = (78)/(3) = 26 implies Z = 27`

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The element which has a `K_(alpha)` X-rays line of wavelength `1.8 Å` is `(R = 1.1 xx 10^(7) m^(-1), b = 1 and sqrt(5//33) = 0.39)`A. `C o, Z = 27`B. `Iron, Z = 26`C. `M n, Z = 25`D. `N i, Z = 28`

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