The 15^th group element with highest boiling point is

Melting point…As>Sb>Bi>P>N ;

Boiling point….N<P<As<Bi<Sb ;

Density……….N<P<As<Sb<Bi ;

Electronegativity……N>P>As>Sb=Bi

Electron gain enthalpy of Nitrogen is positive

Ionization enthalpy…N>P>As>Sb>Bi

IP₁ of N>O…P>S and As>Se but Sb<Te and Bi<Po;