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  • Help me solve this Which of the following sets of quantum numbers represents the highest energy of an atom?

Which of the following sets of quantum numbers represents the highest energy of an atom?

  • Option 1)

    n= 3, l = 0, m = 0,s = +\frac{1}{2}

  • Option 2)

    n= 3, l = 1, m = 1,s = +\frac{1}{2}

  • Option 3)

    n= 3, l = 2, m = 1,s = +\frac{1}{2}

  • Option 4)

    n= 4, l = 0, m = 0,s = +\frac{1}{2}

 

Answers (3)

best_answer

As we learnt in 

Principal Quantum Number (n) -

 It is a positive integer with value of n = 1,2,3.......

-

 

Azimuthal Quantum Number(l) -

For a given value of n, l can have n values ranging from 0 to n – 1, that is, for a given value of n, the possible value of l are : l = 0, 1, 2, ....( n –1)

-

 

Energy of orbital is directly proportional to (n+l) value

n=3,l=0\: \: represents\: 3s\: \: orbital

n=3,l=1\: \: represents\: 3p\: \: orbital

n=3,l=2\: \: represents\: 3d\: \: orbital

n=4,l=0\: \: represents\: 4s\: \: orbital

The order of increasing energy of the orbitals is

3s< 3p< 4s< 3d

3d has n=3 and l=2


Option 1)

n= 3, l = 0, m = 0,s = +\frac{1}{2}

Incorrect option

Option 2)

n= 3, l = 1, m = 1,s = +\frac{1}{2}

Incorrect option

Option 3)

n= 3, l = 2, m = 1,s = +\frac{1}{2}

Correct option

Option 4)

n= 4, l = 0, m = 0,s = +\frac{1}{2}

Incorrect option

Posted by

Plabita

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JEE Main high-scoring chapters and topics

Study 40% syllabus and score up to 100% marks in JEE

3rd option is crct.....bcoz here  the value of (n+l) is highest.....

Posted by

Aayush

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