Out of "Li" and "Be" ,which is expected to have higher second ionization enthalpy?

The atomic numbers of vandium (V) . Chromium (Cr) , manganese (Mn) and iron (Fe) respectively 23, 24,25 and 26. Which one of these may be expected to have the higher second ionization enthalpy ?

The atomic numbers of vanasium (V) Chormium (Cr), manganese (Mn) and iron (Fe) respectively 23, 24, 25 and 26.which one of these may be expected to have the higher seconds ionization enthalpy ?

The atomic number of V,Cr, Mn and Fe are respectively 23,24,25 and 26. Which one of these may be expected to have the highest second ionization enthalpy?

The atomic numbers of vanadium (V) . Chromium (Cr) , managanese (Mn) and iron (Fe) respectively 23,24,25 and 26 . Which one of these may be expected to have the higer second ionization enthalpy?

Ionization enthalpies are

Which isomer is expected to have a higher melting point?

The atomic numbers of Ti, B, Cr and Mn are respectively 22,23,24 and 25 . Which one of these may be expected to have the highest second ionisation enthalpy?