Plot a graph to show the variation in values of IE₁, IE₂ and IE₃ for the group 13 elements (Table 13.1), and plot a similar graph to show the variation in values of IE₁ and IE₂ for the group 2 metals (Table 12.1). Account for differences in trends of IE₂ for the group 2 and 13 elements.

Table 13.1

Table 12.1.

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Property Atomic number, Z Ground state electronic configuration Enthalpy of atomization, AH°(298 K)/kJ mol-¹ Melting point, mp/K Boiling point, bp/K Standard enthalpy of fusion, Afus H° (mp)/kJ mol™¹ First ionization energy, IE₁/kJ mol-¹ Second ionization energy, IE₂/kJ mol-¹ Third ionization energy, IE3/kJ mol-¹ Fourth ionization energy, IE4/kJ mol-¹ Metallic radius, metal/pm² B 5 [He]2s²2p¹ 582 2453 4273 50.2 800.6 2427 3660 25 030 Al 13 [Ne]3s²3p¹ 330 933 2792 10.7 577.5 1817 2745 11 580 143 Ga 31 [Ar]3d¹04s²4p¹ 277 303 2477 5.6 578.8 1979 2963 6200 153 In 49 81 [Kr]4d¹05s²5p [Xe]4f¹4 5d¹06s²6p¹ 243 430 2355 3.3 558.3 1821 2704 5200 167 182 576.5 1730 4.1 589.4 1971 2878 4900 171