Which Of The Following Has The Highest Second Ionisation Energy?

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Question

Which of the following has the highest second ionisation energy?

Solution

Correct option is

Chromium

 

Cr(24) = [Ar]18 3d5, 4s1

Chromium after losing one electron gain stable configuration due to the presence of half-filled d-orbitals, therefore its second ionisation enthalpy is highest. 

Testing

SIMILAR QUESTIONS

Q1

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]

Q2

Which of the following is the most electropositive element?

Q3

Which of the following sequence correctly represents the decreasing acidic nature of oxides?

Q4

Which of the following pairs of species have nearly same size?

Q5

The set representing the correct order of ionic radius is

Q6

The pair of elements having approximately equal ionisation potential is

Q7

Which is not the correct order for the stated property?

Q8

The correct order of ionisation energy of C, N, O, F is

Q9

The electron affinity values (in kg mol–1) of three halogens XY and Z are respectively –349, –333 and –325. Then XY and Z respectively, are

Q10

The electronic configuration of the element with maximum electron affinity is