Which of the following order incorrectly represents the property indicated?
1) \(F^{-} < Cl^{-} < Br^{-} < I^{-}\)-polarisability
2) NaF < \(Na_{2}O < Na_{3}N\)-Covalent character
3) \(Na^{+} > Mg^{2+} > Al^{3+} > Si^{4+}\)- Polarising power
4) NaCl < LiF -lattice energy