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प्रश्न
Briefly give the basis for Pauling's scale of electronegativity.
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उत्तर
Pauling’s scale:
- Electronegativity is the relative tendency of an element present in a covalently bonded molecule to attract the shared pair of electrons towards itself.
- Pauling assigned arbitrary values of electronegativities for hydrogen and fluorine as 2.2 and 4, respectively.
- Based on this the electronegativity values for other elements can be calculated using the following expression.
(XA − XB) = `0.182 sqrt("E"_"AB" - ("E"_"AA" xx "E"_"BB")^(1/2))`
Where EAB, EAA, and EBB are the bond dissociation energies of AB, A2, and B2 molecules respectively.
XA and XB are electronegativity values of A and B.
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संबंधित प्रश्न
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| IE1 | IE2 | IE3 | IE4 | IE5 |
| 577.5 | 1,810 | 2,750 | 11,580 | 14,820 |
The element is
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Explain the Pauling method for the determination of ionic radius.
Explain the following, give an appropriate reason.
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Explain the following, give an appropriate reason.
First ionisation potential of the C-atom is greater than that of the B atom, whereas the reverse is true is for the second ionisation potential.
Explain the following, give an appropriate reason.
The electron affinity values of Be and Mg are almost zero and those of N (0.02 eV) and P (0.80 eV) are very low.
State the trends in the variation of electronegativity in groups and periods.
