Question

Which of the following isoelectronic ions has lowest ionisation energy? 

Solution

Correct option is

S2–

S2– has the largest size and hence, has the lowest ionization energy.

SIMILAR QUESTIONS

Q1

Which of the following ion is the smallest ion?

Q2

Which of the following is the smallest in size?

Q3

The smallest among the following ions is

Q4

In the isoelectronic species the ionic radii (Å) of N3–, O2– and F are respectively given by   

Q5

The trivalent ion having largest size in lanthanide series is

Q6

Which of the following elements will have the lowest first ionisation energy?

Q7

A sudden large jump between the values of second and third ionisation energies of an element would be associated with the electronic configuration 

Q8

The correct order of ionisation energy for comparing carbon, nitrogen and oxygen is

Q9

Which of the following relation is correct?

Q10

If the IP of Na is 5.48 eV, the ionization potential of K will be