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How many unpaired electrons are present ...

How many unpaired electrons are present in `Ni^(2+)`?

A

0

B

2

C

4

D

8

Text Solution

Verified by Experts

The correct Answer is:
B
`Ni^(2+) to 1s^(2)2s^(2)2p^(6)3s^(2)3p^(6)3d^(8)`
No. of unpaired electron = 2
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CENGAGE CHEMISTRY-ATOMIC STRUCTURE-MANDATORY EXERCISE (Exercise Set II)
  1. A neutral atom of an element contains 17 electrons. Its nucleus has 20...

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  2. The size of the nucleus is approximately

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  3. e/m ratio is highest for

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  4. Increasing order for the value of charge/mass is

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  5. Which one of the following pair represents isobars?

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  6. An isotone of ""(32)^(76)Ge is -

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  7. Which of the following are isoelectronic?

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  8. Consider the following pairs of ions: (1) Sc^(3+) and Ti^(4+) (2)...

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  9. Which of the following salt has isoelectronic cation and anion?

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  10. How many unpaired electrons are present in Ni^(2+)?

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  11. Which of the following has minimum number of unpaired d-electrons?

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  12. Hund's rule is applicable for:

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  13. Which quantum number determines the shape of the orbital?

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  14. Magnetic quantum number specifies:

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  15. The correct set of n, l, m, quantum numbers for the unpaired electron ...

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  16. In a quantum level the energies of the orbitals will be in the order:

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  17. The set of quantum numbers for the 19th electron in chromium is:

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  18. If elements with principal quantum number n gt 4 is not allowed in na...

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  19. Number of waves made by a Bohr electron in an orbit of maximum magneti...

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  20. A given orbital is labelled by the magnetic quantum number m=-1. This ...

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