Which element of first transition series has highest second ionization enthalpy ?

(i) Write the balanced equations to represent what happens when (a) acidified potassium permanganates reacts with hydrogen sulphide ? (b) acidified potassium dichromate solution reacts with iron (II) solution (ionic equation) ? (ii) The figure given below illustrates the first ionisation enthalpies of first, second and third series of transition elements. (a) Which series amongst the first, second and third series of transition elements have the highest first ionisation enthalpy and Why ? (b) Why there is a fall in IE_(2) from Cr to Mn and from Cu to Zn ? Explain.

Which ions of 1st row transition series show highest paramagnetism ?

The halogen which has highest electron gain enthalpy is

Which has highest electron affinity?

In 1st row transition series the highest oxidation number is shown by

Why the properties of third transition series are very similar to second transition series ?