LIVE Course for free

Rated by 1 million+ students
Get app now
0 votes
2.7k views
in Quantum Mechanical Model of Atom by (46.8k points)
closed by

Explain about – 

(1) Magnetic quantum number 

(2) Spin quantum number

1 Answer

+1 vote
by (47.9k points)
selected by
 
Best answer

(1) Magnetic quantum number:

  • It is denoted by the letter m1 It takes integral values ranging from –I to +I through 0. i.e. if l = 1; m = -1, 0 and +1. 
  • The Zeeman Effect (the splitting of spectral lines in a magnetic field) provides the experimental justification for this quantum number. 
  • The magnitude of the angular momentum is determined by the quantum number l while its direction is given by magnetic quantum number

(2) Spin quantum number:

  • The spin quantum number represents the spin of the electron and is denoted by the letter ‘ms ‘. 
  • The electron in an atom revolves not only around the nucleus but also spins. It is usual to write this as electron spins about its own axis either in a clockwise direction or in anti – clockwise direction. 
  • Corresponding to the clockwise and anti – clockwise spinning of the electron, maximum two values are possible for this quantum number.
  • The values of ‘ms ‘ is equal to \(-\frac{1}{2}\) and \(+\frac{1}{2}\).

Welcome to Sarthaks eConnect: A unique platform where students can interact with teachers/experts/students to get solutions to their queries. Students (upto class 10+2) preparing for All Government Exams, CBSE Board Exam, ICSE Board Exam, State Board Exam, JEE (Mains+Advance) and NEET can ask questions from any subject and get quick answers by subject teachers/ experts/mentors/students.

...