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Do atomic orbitals have sharp boundaries...

Do atomic orbitals have sharp boundaries ? Explain why or why not ? or Why don't we draw a boundary surface diagram within which the probability of finding the electron is 100% ?

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No, atomic obitals do not have sharp boundaries because the probability of finding the electron even at large distances may be very small but not equal to zero
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The shapes of orbital may be represented by boundary surface diagrams. These boundary surface diagram give the most probable regions. S-orbitals are non-directional while p-, d- and f-orbitals have different orientations given by m_l values. These boundary surfaces also have sperical nodes or radial nodes and nodal planes which depend upon the values of n and l. How do 3s and 4s orbitals differ in terms of nodes present in these ?

The shapes of orbital may be represented by boundary surface diagrams. These boundary surface diagram give the most probable regions. S-orbitals are non-directional while p-, d- and f-orbitals have different orientations given by m_l values. These boundary surfaces also have sperical nodes or radial nodes and nodal planes which depend upon the values of n and l. Does d_z^2 orbital has zero electron density in xy plane ?

The shapes of orbital may be represented by boundary surface diagrams. These boundary surface diagram give the most probable regions. S-orbitals are non-directional while p-, d- and f-orbitals have different orientations given by m_l values. These boundary surfaces also have sperical nodes or radial nodes and nodal planes which depend upon the values of n and l. How many spherical nodes are present in 3p - orbital?

The shapes of orbital may be represented by boundary surface diagrams. These boundary surface diagram give the most probable regions. S-orbitals are non-directional while p-, d- and f-orbitals have different orientations given by m_l values. These boundary surfaces also have sperical nodes or radial nodes and nodal planes which depend upon the values of n and l. How many angular nodes are present in 3d_(yz) orbital?

The shapes of orbital may be represented by boundary surface diagrams. These boundary surface diagram give the most probable regions. S-orbitals are non-directional while p-, d- and f-orbitals have different orientations given by m_l values. These boundary surfaces also have sperical nodes or radial nodes and nodal planes which depend upon the values of n and l. How many orbitals are possible for l = 2 subshell ?

Why do two electrons in an orbital have opposite spin ?

Molecular orbital (MOT) the atoms in a molecule are supposed to loose their individual control over the electrons . The nuclei of the bonded atoms are considered to be present at equilibrium in inter-nuclear positions . The orbitals where the probability of finding electrons is maximum are multicentred orbitals called molecular orbitals extending over 2 or more nuclei when a pair of atomic orbitals combine and give rise to a pair of molecular MO's in internuclear region but decreased for antibonding MO's . Shielding of the nuclei by-increased electron density in bonding MO's reduces inter nuclear repulsion & thus stabilizes the molecule whereas lower electron density in antibonding MO's increases the repulsion and destabilises the system . Which of the following species have identical value of bond order ?

Why was a chagne in the Bohr Model of atom required? Due to which important development concept of movement of an electron in an orbit was replaced by the concept of probabiltiy of finding electron in an orbital?what is the name given to the changed model fo atom?

PRADEEP-STRUCTURE OF ATOM-Conceptual Questions
  1. Name the quantum number which does not follow from the solution of Sc...

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  2. What is the difference between the notations l and L ?

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  3. Which of the four quantum number (n, l, m(l), m(s)) determine (a) the ...

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  4. Why Pauli exlusion principle is called exlusion principle ?

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  5. At what distance is the radial probability maximum for 1s orbital ? Wh...

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  6. Do atomic orbitals have sharp boundaries ? Explain why or why not ? or...

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  7. Draw the shapes (boundary surfaces) of the following orbitals: (a) 2...

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  8. Discuss the similarities and differences between a 1s and 2s orbital.

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  9. How many radial/spherical nodes will be present in the 5f orbital ?

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  10. (i) What is common between d9xy) and d(x^(2) - y^(2)) orbitals ? (ii) ...

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  11. For each of the following pair of hydrogen orbitals, indicate which is...

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  12. Which orbital in each of the following pairs is lower in energy in a m...

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  13. Why Hund's rule is called rule of maximum multiplicity ?

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  14. How many electrons in sulphur (Z = 16) can have n + l = 3 ?

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  15. The 4f subshell of an atom contains 10 electrons. What is the maximum ...

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  16. Which out of Cu^(2+), Fe^(2+) and Cr^(3+) has highest paramagnetism an...

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  17. What is the maximum number of electrons that can be present in an atom...

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  18. One unpaired electron in an atom distributes a magnetic moment of 1.1 ...

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  19. The ground-state electronic configurations listed here are incorrect. ...

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  20. What is the deviation from Aufbau Principle in case of electronic conf...

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