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An ion has 18 electrons in the outermost...

An ion has 18 electrons in the outermost shell it is

A

`Cu^(+)`

B

`Th^(4+)`

C

`Cs^(+)`

D

`K^(+)`

Text Solution

Verified by Experts

The correct Answer is:
A
An ion has 18 electrons in the outermost shell, that means in the ground state it has 18 electrons in the penultimate shell.
`""_(29)Cu=1s^(2),2s^(2)2p^(6),3s^(2)3p^(6)3d^(10),4s^(1)`
`Cu^(+)=[Ar]`.
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ERRORLESS-STRUCTURE OF ATOM-NCERT BASED QUESTIONS (Quantum Number, Electronic Configuration and Shape of Orbitals)
  1. The orbital with maximum energy is

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  2. The correct orders of increasing energy of atomic orbitals is

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  3. An ion has 18 electrons in the outermost shell it is

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  4. Filling of Electrons in Molecular Orbitals

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  5. Which of the following sets of orbitals may be degenerate

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  6. Which of the following orbital is not possible

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  7. Correct statement is

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  8. The number of orbitals present in the shell with n=4 is

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  9. The angular momentum of an electron is zero. In which orbital may it b...

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  10. The number of electrons that can be accommodated in dz^2 orbital is

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  11. The most stable orbitals are

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  12. Which of the following orbitals will have zero probability of finding ...

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  13. The total number of electrons present in all s orbitals, all the p orb...

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  14. Which of the following molecular orbitals has two nodal planes ?

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  15. The number of radial nodes for 3p orbital is......

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  16. Number of angular nodes for 4d orbtial is.........

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  17. Total number of orbitals associated with thrid shell will be.....

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  18. Orbital angular momentum depends on .........

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  19. For the electrons of oxygen atom, which of the following statemetns c...

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  20. The five d-orbitals are designated as d(xy), d(yz), d(xz), d(x^(2) - y...

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