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Which of the following set(s) of quantum numbers is(are) not allowed:
- a)n = 3, l = 2, ml = -1
- b)n = 4, l = 0, ml = -1
- c)n = 3, / = 3, ml = -3
- d)n = 5, / = 3, ml = +2
Correct answer is option 'B,C'. Can you explain this answer?
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Which of the following set(s) of quantum numbers is(are) not allowed:a...
Forbidden Quantum Numbers in Atoms
Forbidden quantum numbers are those that do not conform to the rules of quantum mechanics. The rules of quantum mechanics dictate that the values of n, l, ml, and ms must be within specific ranges. If any of these quantum numbers are outside the allowed range, they are considered forbidden.
Forbidden Quantum Numbers
a) n = 3, l = 2, ml = -1
According to the rules of quantum mechanics, the values of n, l, and ml must be such that l ≤ n-1 and -l ≤ ml ≤ l. In this case, n = 3 and l = 2. Therefore, the allowed values of ml are -2, -1, 0, 1, and 2. However, ml is given as -1, which is an allowed value. Therefore, this set of quantum numbers is allowed.
b) n = 4, l = 0, ml = -1
In this case, l = 0, which means that ml must also be 0. Therefore, ml cannot be -1. This set of quantum numbers is not allowed.
c) n = 3, l = 3, ml = -3
For a given value of n, the maximum value of l is n-1. Therefore, in this case, l = 3 is not allowed because n = 3. Therefore, this set of quantum numbers is not allowed.
d) n = 5, l = 3, ml = 2
For a given value of l, ml must be such that -l ≤ ml ≤ l. In this case, l = 3, which means that the allowed values of ml are -3, -2, -1, 0, 1, 2, and 3. Therefore, ml = 2 is an allowed value. This set of quantum numbers is allowed.
Conclusion
The sets of quantum numbers that are not allowed are b) n = 4, l = 0, ml = -1 and c) n = 3, l = 3, ml = -3. These sets of quantum numbers violate the rules of quantum mechanics.
Forbidden quantum numbers are those that do not conform to the rules of quantum mechanics. The rules of quantum mechanics dictate that the values of n, l, ml, and ms must be within specific ranges. If any of these quantum numbers are outside the allowed range, they are considered forbidden.
Forbidden Quantum Numbers
a) n = 3, l = 2, ml = -1
According to the rules of quantum mechanics, the values of n, l, and ml must be such that l ≤ n-1 and -l ≤ ml ≤ l. In this case, n = 3 and l = 2. Therefore, the allowed values of ml are -2, -1, 0, 1, and 2. However, ml is given as -1, which is an allowed value. Therefore, this set of quantum numbers is allowed.
b) n = 4, l = 0, ml = -1
In this case, l = 0, which means that ml must also be 0. Therefore, ml cannot be -1. This set of quantum numbers is not allowed.
c) n = 3, l = 3, ml = -3
For a given value of n, the maximum value of l is n-1. Therefore, in this case, l = 3 is not allowed because n = 3. Therefore, this set of quantum numbers is not allowed.
d) n = 5, l = 3, ml = 2
For a given value of l, ml must be such that -l ≤ ml ≤ l. In this case, l = 3, which means that the allowed values of ml are -3, -2, -1, 0, 1, 2, and 3. Therefore, ml = 2 is an allowed value. This set of quantum numbers is allowed.
Conclusion
The sets of quantum numbers that are not allowed are b) n = 4, l = 0, ml = -1 and c) n = 3, l = 3, ml = -3. These sets of quantum numbers violate the rules of quantum mechanics.
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Which of the following set(s) of quantum numbers is(are) not allowed:a...
In option b 4s ,so m=0 only
in option c 3f,3f is not exist becz in 3rd orbit only three orbital (s,p,d)is exist
in option c 3f,3f is not exist becz in 3rd orbit only three orbital (s,p,d)is exist
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Which of the following set(s) of quantum numbers is(are) not allowed:a)n = 3, l = 2, ml= -1b)n = 4, l = 0, ml= -1c)n = 3, / = 3, ml= -3d)n = 5, / = 3, ml= +2Correct answer is option 'B,C'. Can you explain this answer? for Chemistry 2025 is part of Chemistry preparation. The Question and answers have been prepared according to the Chemistry exam syllabus. Information about Which of the following set(s) of quantum numbers is(are) not allowed:a)n = 3, l = 2, ml= -1b)n = 4, l = 0, ml= -1c)n = 3, / = 3, ml= -3d)n = 5, / = 3, ml= +2Correct answer is option 'B,C'. Can you explain this answer? covers all topics & solutions for Chemistry 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of the following set(s) of quantum numbers is(are) not allowed:a)n = 3, l = 2, ml= -1b)n = 4, l = 0, ml= -1c)n = 3, / = 3, ml= -3d)n = 5, / = 3, ml= +2Correct answer is option 'B,C'. Can you explain this answer?.
Which of the following set(s) of quantum numbers is(are) not allowed:a)n = 3, l = 2, ml= -1b)n = 4, l = 0, ml= -1c)n = 3, / = 3, ml= -3d)n = 5, / = 3, ml= +2Correct answer is option 'B,C'. Can you explain this answer? for Chemistry 2025 is part of Chemistry preparation. The Question and answers have been prepared according to the Chemistry exam syllabus. Information about Which of the following set(s) of quantum numbers is(are) not allowed:a)n = 3, l = 2, ml= -1b)n = 4, l = 0, ml= -1c)n = 3, / = 3, ml= -3d)n = 5, / = 3, ml= +2Correct answer is option 'B,C'. Can you explain this answer? covers all topics & solutions for Chemistry 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of the following set(s) of quantum numbers is(are) not allowed:a)n = 3, l = 2, ml= -1b)n = 4, l = 0, ml= -1c)n = 3, / = 3, ml= -3d)n = 5, / = 3, ml= +2Correct answer is option 'B,C'. Can you explain this answer?.
Solutions for Which of the following set(s) of quantum numbers is(are) not allowed:a)n = 3, l = 2, ml= -1b)n = 4, l = 0, ml= -1c)n = 3, / = 3, ml= -3d)n = 5, / = 3, ml= +2Correct answer is option 'B,C'. Can you explain this answer? in English & in Hindi are available as part of our courses for Chemistry.
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