NEET Chemistry Quantum Mechanical Model MCQ Question
Which combinations of statements about the quantum mechanical model of the atom are correct?
- The principal quantum number 'n' determines the energy and size of an orbital. 2) The quantum number 'l' can take negative values. 3) Electrons in the same subshell have the same energy.
- The shape and orientation of orbitals affect the probability of finding electrons. 2) The energy of an electron in a hydrogen atom depends only on 'n'. 3) Each orbital can hold a maximum of 2 electrons with opposite spins.
- Quantum numbers include 'n', 'l', and 'm_l' which define the orbitals. 2) The number of orbitals in a subshell increases with increasing 'l'. 3) Electrons can exist in any orbital regardless of energy.
- The 3d orbital has quantum numbers 'n=3', 'l=2'. 2) The size of an orbital is independent of quantum numbers. 3) Planck's quantum theory suggests energy can be emitted continuously.
Correct Answer
Detailed Explanation
Option B is correct because it confirms that the shape and orientation of orbitals affect the probability of finding electrons, the energy of an electron in a hydrogen atom depends only on 'n', and each orbital holds a maximum of 2 electrons with opposite spins. The other options contain inaccuracies regarding quantum numbers and orbital properties.
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