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The ionisation enthalpy of lithium is mu...

The ionisation enthalpy of lithium is much lower than that of helium despite the fact that the nuclear charge of lithium is `+3` and that of helium is `+2`. It is due to:

A

2s electron in lithium is more strongly bound to the nucleus than the 1s electron in He

B

2s electron in lithium is equally bound to the nucleus than the 1s electron in He

C

2s electron in lithium is less strongly bound to the nucleus than the 1s electron in He

D

Atomic size of He is more than Li

Text Solution

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The correct Answer is:
C
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GRB PUBLICATION-PERIODIC TABLE-C.Ionisation Energy
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  3. The ionisation enthalpy of lithium is much lower than that of helium d...

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  4. The first ionisation enthalpy (Delta(i)H^(o-)) values of the third per...

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  5. Correct order of IE(1) are: (P) Li lt B lt Be lt C (Q) O lt N lt F ...

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  6. If {:(X(g)^(-) rarr X(g)^(2) +3e^(-),DeltaH(1)= 900 kJ),(X(g) rarr X(g...

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  7. The correct order of the second ionisation potential of carbon, nitrog...

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  9. One method for calculating Z(eff) is to use the equation: Z(eff) = s...

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  10. Atomic nitrogen has a higher ionization energy than atomic oxygen. Thi...

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  11. Which elemenet has the smallest first-ionization energy?

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  12. Which set is expected to show the smallest difference in IE(1) ?

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  13. When the elements carbon, nitrogen and oxygen are arranged in order of...

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  14. Which has the highest ionization energy for the removal of the second ...

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  16. Which atom has the smallest first ionization energy?

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  17. Which element has the largest first ionization energy?

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