badge image

Enroll For Free Now & Improve Your Performance.

×
User Icon
User Icon
User Icon
User Icon
User Icon

Thank you for registering.

One of our academic counsellors will contact you within 1 working day.

Please check your email for login details.
MY CART (5)

Use Coupon: CART20 and get 20% off on all online Study Material

ITEM
DETAILS
MRP
DISCOUNT
FINAL PRICE
Total Price: Rs.

There are no items in this cart.
Continue Shopping
Menu
Grade: 12

                        

Its about atomic structure and finding n value please help in this sum

2 years ago

Answers : (1)

Arun
24742 Points
							
 
Note : nth line of Lyman series means electron jumping from (n + 1 )th orbit to 1storbit.
 
For an electron to revolve in (n + 1)th orbit.
 
2πr = (n + 1 )λ
 
⇒ λ = 2π / (n + 1) x r = 2π / (n + 1) [ 0.529 x 10-10] (n + 1)2 / Z
 
⇒ 1 / λ = Z / 2π [0.529 x 10-10] (n + 1) …(i)
 
Also we know that when electron jumps from (n + 1)th orbit to 1st orbit
 
1/ λ = RZ2 [ 1 / 12 – 1 / (n + 1)= 1.09 x 107Z2 [ 1 – 1 / (n + 1)2]
 
From (i) and (ii)
 
Z / 2π (0.529 x 10-10) (n + 1) = 1. 09 x 107 Z2[1 – 1 / (n + 1)2]
 
On solving, we get n = 24
2 years ago
Think You Can Provide A Better Answer ?
Answer & Earn Cool Goodies


Course Features

  • 731 Video Lectures
  • Revision Notes
  • Previous Year Papers
  • Mind Map
  • Study Planner
  • NCERT Solutions
  • Discussion Forum
  • Test paper with Video Solution


Course Features

  • 141 Video Lectures
  • Revision Notes
  • Test paper with Video Solution
  • Mind Map
  • Study Planner
  • NCERT Solutions
  • Discussion Forum
  • Previous Year Exam Questions


Ask Experts

Have any Question? Ask Experts

Post Question

 
 
Answer ‘n’ Earn
Attractive Gift
Vouchers
To Win!!! Click Here for details