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IE(1) and IE(2) of Mg are 178 and 348 kc...

`IE_(1)` and `IE_(2)` of `Mg` are `178` and `348 kcal mol^(-1)`. The energy required for the reaction `Mg rarr Mg^(2+)+2e^(-)` is

A

`+170` Kcal

B

`+526` Kcal

C

`-170` Kcal

D

`-526` Kcal

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The correct Answer is:
B
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The second ionisation energies are higher than the first ionisation energies. This is mainly due to the fact that after the removal of the first electrons, the atom changes inot mono valent position ion. In the ion, the number of electrons decreases but the nuclear charge remains the same. As a result of this, the remaining electrons are held more tightly by the nucleus and it becomes difficult to remove the second electron . Therefore, the value of second ionisation energy . (IE_(2)) , is greater than that of the first ionisation energy (IE_(1)) . Similarly third ionisation energy (IE_(3)) is greater than that of second IE_(2) . IE_(1) and IE_(2) of Mg metal are 178 and 348 kcal/mol respectively . The energy required for the given reaction is : Mg(g)rarr Mg^(+2)(G)+2e^(-)

The second ionisation energies are higher than the first ionisation energies. This is mainly due to the fact the after the removal of the first electron, the atom changes into monovalent positive ion. In the ion, the number of electrons decreases but the nuclear charge remains the same. as a result of this, the remaining electrons are held more tightly by the nucleus and it becomes difficult to remove the second electron. therefore, the value of second ionisation energy. (IE_(2)) , is greater than that of the first ionisatio energy (IE_(1)) . similarly third ionisation energy (IE_(3)) is greater than that of second IE_(2) . Q. IE_(1) and IE_(2) of Mg metal are 178 and 348 kcal/mol respectively. the energy required for the given reaction is: Mg(s) to Mg^(+2)+2e^(-)

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The IE_1 " and " IE_2 of Mg (g) are 740 and 1450 kJ "mol:^(-1) . Calculate the percentage of Mg^(+) (g) and Mg^(2+) (g) if 1g of Mg (g) absorbs 50 kJ of energy.

MOTION-PERIODIC TABLE -Exercise - 1
  1. The maximum tendency to form unipositive ion is for the elment with th...

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  2. The second ionisation potentials in electron volts of oxygen and fluor...

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  3. A sudden large jump between the values of second and third ionisation ...

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  4. The correct order of stability of Al^(+) , Al^(+2) , Al^(+3) is :

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  5. The ionization energy of sodium is 495 kJ mol^(-1). How much energy is...

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  6. Ionisation energy increases in the order :

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  7. Mg forms Mg(II) because of :

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  8. IE(1) and IE(2) of Mg are 178 and 348 kcal mol^(-1). The energy requir...

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  9. Highest ionisation potential in a period is shown by

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  10. In which case the energy released is minimum -

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  11. In the formation of a chloride ion, from an isolated gaseous chlorine ...

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  12. The correct order of electron affinity is:

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  13. The screening effect of d-electron is

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  14. The X-X bond length is 1.00A^(0) and C-C bond length is 1.54A^(@). If ...

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  15. Electronegativity scale of pauling is based upon -

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  16. The correct set of decreasing order of electronegativity is

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  17. Which of the following is affected by stable configuration of an atom ...

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  18. Correct order of electronegativity of N,P,C and Si on Pauling scale is...

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  19. Polarity of a bond can be explained by :–

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  20. The outermost electronic configuration of the most electronegative ele...

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