Question:
Which of the following statements are correct about the postulates of quantum mechanical model of an atom?
(i) The energy of electron in atom is quantized.
(ii) The existence of quantized electronic energy level is a result of the particle property of electrons.
(iii) The path of the electron can be determined accurately.
(iv) In a multi electron atom, the electrons are filled in various orbitals in the order of increasing energy.
(v) The probability of finding an electron at a point within an atom is proportional to the square of the orbital wave function.
Which of the following statements are correct about the postulates of quantum mechanical model of an atom?
(i) The energy of electron in atom is quantized.
(ii) The existence of quantized electronic energy level is a result of the particle property of electrons.
(iii) The path of the electron can be determined accurately.
(iv) In a multi electron atom, the electrons are filled in various orbitals in the order of increasing energy.
(v) The probability of finding an electron at a point within an atom is proportional to the square of the orbital wave function.
(ii) The existence of quantized electronic energy level is a result of the particle property of electrons.
(iii) The path of the electron can be determined accurately.
(iv) In a multi electron atom, the electrons are filled in various orbitals in the order of increasing energy.
(v) The probability of finding an electron at a point within an atom is proportional to the square of the orbital wave function.
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Quantum model is based on probability, not definite paths.
Updated On: Apr 24, 2026
- (i), (iv), (v)
- (i), (ii), (iv)
- (i), (iii), (v)
- (ii), (iii), (v)
- (i), (ii), (v)
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The Correct Option is A
Solution and Explanation
Concept:
• Quantum mechanical model principles
Step 1: Evaluate statements
(i) True (quantized energy levels)
(ii) False (due to wave nature, not particle nature)
(iii) False (Heisenberg uncertainty principle)
(iv) True (Aufbau principle)
(v) True ($|\psi|^2$ gives probability) Final Conclusion:
Option (A)
• Quantum mechanical model principles
Step 1: Evaluate statements
(i) True (quantized energy levels)
(ii) False (due to wave nature, not particle nature)
(iii) False (Heisenberg uncertainty principle)
(iv) True (Aufbau principle)
(v) True ($|\psi|^2$ gives probability) Final Conclusion:
Option (A)
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