The Successive Ionisation Energy Values For An Element ‘X’ Are Given Below:  1st ionisation Energy = 410 KJ Mol–1 2nd ionisation Energy = 820 KJ Mol–1 3rd ionisation Energy = 1100 KJ Mol–1 4th ionisation Energy = 1500 KJ Mol–1 5th ionisation Energy = 3200 KJ Mol–1 Find Out The Number Of Valence Electrons For The Atom ‘X’. 

The charge/size ratio of a cation determines its polarizing power. Which one of the following sequences represents the increasing order of the polarizing power of the cationic species, K⁺, Ca²⁺, Mg²⁺, Be²⁺? 

Which one of the following arrangements represents the correct order of electron gain enthalpy (with negative sign) of the given atomic species?

Which is likely to show inert pair effect?

The correct order of the size of iodine species is

In which one of the following pairs the radius of the second species is greater than that of the first?

The increasing order of the first ionisation enthalpies of elements B, P, S and F (lowest first) is

The element having highest electron affinity is

Diagonal relationship is for

The correct order according to size is

In which of the following arrangement the order is not according to the property indicated against it?