Which is not the correct order for the stated property?
F > O > N, first ionisation enthalpy
On moving along a period, ionisation enthalpy increases. Thus, the order of ionisation enthalpy should be as follows:
F > O > N
But N has half-filled configuration, therefore it is more stable than O and has higher ionisation enthalpy.
The formation of the oxide ion O2–(g) requires first an exothermic and then an endothermic step as shown below
This is because
The electronic configuration of four elements are given below. Which element does not belong to the same family?
The least stable ion among the following is
Ist and IInd IE of Mg are 7.646 and 15.035 eV respectively. The amount of energy needed to convert all the atoms of magnesium into Mg2+ ions present in 12 mg of magnesium vapours is [Given, 1 eV = 96.5 kJ mol–1]
Which of the following is the most electropositive element?
Which of the following sequence correctly represents the decreasing acidic nature of oxides?
Which of the following pairs of species have nearly same size?
The set representing the correct order of ionic radius is
The pair of elements having approximately equal ionisation potential is
The correct order of ionisation energy of C, N, O, F is