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प्रश्न
The element with positive electron gain enthalpy is
विकल्प
Hydrogen
Sodium
Argon
Fluorine
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उत्तर
Argon
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संबंधित प्रश्न
Various successive ionisation enthalpies (in kJ mol-1) of an element are given below.
| IE1 | IE2 | IE3 | IE4 | IE5 |
| 577.5 | 1,810 | 2,750 | 11,580 | 14,820 |
The element is
In the third period the first ionization potential is of the order.
Which of the following is the second most electronegative element?
In a given shell the order of screening effect is
What are isoelectronic ions? Give examples.
Explain the Pauling method for the determination of ionic radius.
By using Pauling's method calculate the ionic radii of K+ and Cl− ions in the potassium chloride crystal. Given that `"d"_("K"^+) - "Cl"^-` = 3.14 Å
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.
