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Calculate the effective nuclear charge e...

Calculate the effective nuclear charge experienced by the `4s`-electron in potassium atom `(Z = 19)`.

A

`2.31`

B

`2.64`

C

`5.19`

D

`2.1`

Text Solution

Verified by Experts

The correct Answer is:
A
`chi_(AS)=0.359(Z_(eH))/(r^(2))+0.744`
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NARAYNA-CLASSIFICATION OF ELEMENTS AND PERIODICITY -EXERCISE - 2 (C.W)
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  2. If the ionization enthalpy and electron gain enthalpy of an element ar...

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  3. Calculate the effective nuclear charge experienced by the 4s-electron ...

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  4. Which of the following element is most electropositive?

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  5. Which of the following elements has zero electron affinity ?

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  6. The first ionization energy value of an element area 191, 578,872 and ...

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  7. Which of the following elements represents highly electropositive as w...

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  8. Although metals form basic oxides, which of the following metals form ...

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  9. The order in which the following oxides are arranged according to decr...

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  10. An element of atom mass 39 has the electron configuration 2,8,8,1 whic...

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  11. Match the entries of Column I with appropriate entries of Column II an...

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  12. Match the entries of Column I with appropriate entries of Column II an...

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  13. Match the entries of Column I with appropriate entries of Column II an...

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  14. Which of the following sequences contain atomic numbers of only repres...

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  15. Which of the following elements will gain one electron more readily in...

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  16. Which of the following statements are correct ?

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  17. Which of the following sets contain only isoelectronic ions?

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  18. In which of the following options order of arrangement does not agree ...

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  19. Which of the following have no unit?

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  20. An element belongs to 3rd period and group 13 of the periodic table. W...

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