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प्रश्न
Assertion: Helium has the highest value of ionisation energy among all the elements known
Reason: Helium has the highest value of electron affinity among all the elements known
विकल्प
Both assertion and reason are true and reason is correct explanation for the assertion
Both assertion and reason are true but the reason is not the correct explanation for the assertion
Assertion is true and the reason is false
Both assertion and the reason are false
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उत्तर
Assertion is true and the reason is false
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संबंधित प्रश्न
Which of the following elements will have the highest electronegativity?
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
The First ionisation potential of Na, Mg and Si are 496, 737 and 786 kJ mol-1 respectively. The ionisation potential of Al will be closer to
What are isoelectronic ions? Give examples.
Define electronegativity.
Explain the Pauling method for the determination of ionic radius.
Explain the periodic trend of ionisation potential.
Why the first ionisation enthalpy of sodium is lower than that of magnesium while its second ionisation enthalpy is higher than that of magnesium?
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.
What is the screening effect?
