The electronic configuration of the element with maximum electron affinity is
1s2, 2s2, 2p6, 3s2, 3p5
Generally electron affinity increases in a period and decreases in a group but due to smaller size and high electron density on fluorine atom, it experience high inter electronic repulsions. Thus, F– ion is less stable in comparison to Cl– ion. Hence, electron affinity is highest for chlorine.
Its electronic configuration is
Cl(17) = 1s2, 2s2, 2p6, 3s2, 3p5
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
Which is not the correct order for the stated property?
The correct order of ionisation energy of C, N, O, F is
The electron affinity values (in kg mol–1) of three halogens X, Y and Z are respectively –349, –333 and –325. Then X, Y and Z respectively, are
Which of the following has the highest second ionisation energy?
The first ionisation energy of oxygen is less than that of nitrogen. Which of the following is the correct reason for this observation?