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What will be the value of screening cons...

What will be the value of screening constant `(sigma)` for the sodium atom?

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The correct Answer is:
For sodium atom `sigma=(2 xx 0.85) +(2 xx 1)=6.8+2=8.8`
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Knowledge Check

  • What is the value of the gas constant R ?

    A
    `8.33"JK"^(-1)"mol"^(-1)`
    B
    `8.35"JK"^(-1)"mol"^(-1)`
    C
    `8.31"JK"^(-1)"mol"^(-1)`
    D
    `8.32"JK"^(-1)"mol"^(-1)`

  • The unit of Stefan's constant sigma is

    A
    `Wm^(-2)K^(-1)`
    B
    `Wm^(2)K^(-4)`
    C
    `Wm^(-2)K^(-4)`
    D
    `Wm^(-2)K^(4)`

  • The unit of Stefan's constant sigma is

    A
    `W m^(-2)K^(-1)`
    B
    `W m^(2)K^(-4)`
    C
    `W m^(-2)K^(-4)`
    D
    `W m^(-2)K^(-4)`
    • VIDYAMANDIR CLASSES (VMC MODULES)-PERIODIC PROPERTIES OF ELEMENTS -Practice Exercise
    1. What will be the value of screening constant (sigma) for the sodium at...

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    2. Why is the radius of aluminium and gallium almost similar?

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    3. Why do inert gases have larger values of atomic radius?

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    4. Why does phosphorous has higher ionization enthalpy than sulphur?

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    5. Why do metals in the 5d transition series (for example, Pt, Au, Ir etc...

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    6. What will be the downward trend of ionization energy in group 13?

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    7. Comment on electron gain enthalpy of alkaline earth metals?

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    8. Why does S^(-) ion not accept the second electron readily?

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    9. Why phosphorous has higher electron affinity than nitrogen?

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    10. Which of these elements have almost same electronegativity? (i) C,I ...

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    11. Which will have a higher value of electronegativity for fluorine, the ...

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    12. Is it possible to calculate the electronegativity of an element if its...

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    13. Why does caesium carbonate not decompose yet lithium carbonate does?

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    14. Least soluble carbonate among alkaline earth metals will be?

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    15. Which of the following alkali metal hydroxides is the strongest base ?

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    16. What will be the value of screening constant (sigma) for the sodium at...

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    17. Why is the radius of aluminium and gallium almost similar?

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    18. Why do inert gases have larger values of atomic radius?

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    19. Why does phosphorous has higher ionization enthalpy than sulphur?

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    20. Why do metals in the 5d transition series (for example, Pt, Au, Ir etc...

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