Advertisements
Advertisements
प्रश्न
What are isoelectronic ions? Give examples.
Advertisements
उत्तर
There are some ions of different elements having the same number of electrons are called isoelectronic ions.
Example: Na+, Mg2+, Al3+, F–, O2– and N3–
APPEARS IN
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 a given shell the order of screening effect is
Which of the following orders of ionic radii is correct?
Define electronegativity.
In what period and group will an element with Z = 118 will be present?
Why the first ionisation enthalpy of sodium is lower than that of magnesium while its second ionisation enthalpy is higher than that of magnesium?
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 formation of \[\ce{F^-_{(g)}}\] from \[\ce{F_{(g)}}\] is exothermic while that of \[\ce{O^2-_{(g)}}\] from \[\ce{O_{(g)}}\] is endothermic.
State the trends in the variation of electronegativity in groups and periods.
