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4s orbitals has less energy than 3d orbi...

`4s` orbitals has less energy than `3d` orbital

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In a hydrogen atom, which orbital is higher in energy than a 3s-orbital?

For a mutielectron atom, the maximum of 2p-orbital in radial probability distribution graph is nearer the nucleus than that of 2s-orbital . Therefore, 2p-orbital should be closer to the nucleus and lower in energy than 2s-orbital. But 2s-orbital has lower energy than 2p-orbital. Explain.

Knowledge Check

  • Statement 1. 4s orbital has lower energy than 3d orbital. Statement 2. s-orbital is spherically symmetrical and remains closer to the nucleus and has lower energy than d-orbital.

    A
    Statement-1 is true , Statement-2 is also true.
    Statement-2 is the correct explanation of Statement-1
    B
    Statement-1 is true , Statement-2 is also true.
    Statement-2 is not correct explanation of Statement-1
    C
    Statement -1 is true, Statement-2 is false.
    D
    Statement-1 is false, Statement-2 is true.

  • In oxygen molecule, sigma2p molecular orbital has lower energy than pi2p orbitals. This is due to

    A
    mixing of sp orbitals of the two oxygen atoms
    B
    non-mixing of 2s 2p orbitals of the two oxygen atoms
    C
    the inclusion of d-orbitals in the molecular orbitals
    D
    electronic repulsion between the electrons of the two atoms.

  • Assertion: The first ionisation energy of Be is greater than boron. Reason: 2p-orbitals have lower energy than 2s-orbital

    A
    Both A and B true and R is the correct explanation A
    B
    Both A and R are true but R is not a correct explanation of A
    C
    A is true but R is false
    D
    A is false but R is true

    • Similar Questions

    Explore conceptually related problems

    In a hydrogen atom, which orbital is higher in energy than 3s-orbital ?

    STATEMENT-1: First ionization enthalpy of Be is greater than that of B. and STATEMENT-2: 2p orbital is lower in energy than 2s, orbital.

    The enrgy level fo 4s-orbital is less than 3d- orbital because :

    Assertion: The first ionization energy of Be is greater than that of B. Reason: 2p-orbital is lowerr in energy than 2s-orbital.

    Assertion: The first ionisation energy of Be is greater than that of B . Reason: 2p-orbital is lower in energy than 2s-orbital.

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