Use Moseley’s law with b = 1 to find the frequency of the K base α x-ray of La(Z = 57) if the frequency of the K base α X-ray of Cu(Z = 29) is known to be 1.88 × 10^18 Hz.
Hrishant Goswami , 10 Years ago
Grade 10
1 Answers
Jitender Pal
Last Activity: 10 Years ago
b = 1
For ∝ a (57)
√v = a (Z - b)
⇒ √v = a (57 – 10 = a * 56 … (1)
For Cu(29)
√1.88 * 10^78 = a(29 - 1) = 28 a … (2)
Dividing (1) and (2)
√v/1.88 * 10^18 = a*56/a*28 = 2.
⇒ v = 1.88 * 10^18(2)^2 4 * 1.88 * 10^18 = 7.52 * 10^8 Hz.
Provide a better Answer & Earn Cool Goodies
Enter text here...
LIVE ONLINE CLASSES
Prepraring for the competition made easy just by live online class.
Full Live Access
Study Material
Live Doubts Solving
Daily Class Assignments
Ask a Doubt
Get your questions answered by the expert for free