Question

What element has kα line of wavelength 1.785 Å?
R = 109737 cm⁻¹.
(a) Platinum (b) Zinc (c) Iron (d) Cobalt

Answer 1

Answer:

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Answer 2

Answer:

ANSWER

For k

α

line

λ

k

α

1

=R(Z−1)

2

[

1

2

1

−

2

2

1

]

(Z−1)

2

=

3

4

λ

k

α

1

R

1

=

3

4

×

1.785×10

−8

1

×

109737

1

⇒(Z−1)

2

=680.6⇒Z−1=26⇒Z=27

Thus, the element is cobalt.