[" The ionization potential "],[" values of an element are in "],[" the following order "],[I_(1)

Second ionization potential value is very low for

Second ionization potential value is very low for

The first ionization enthalpy of the following elements are in the order :

The first ionization enthalpy of the following elements are in the order:

The first ionization potential of Na,Mg,Al and Si are in the order

The first, second, third and fourth, ionization potential values of an element are 8.4, 25.15, 37.92 and 256.3eV respectively. The element is