Answer all the questions (10 points) 25. Why is the second ionization energy always greater than the first, no matter which element is being considered? 26. Ionization energy generally increases from left to right in a given period. However, aluminum has lower ionization energy than magnesium. Explain. 27. Two atoms have the following configurations 1s22s22p6 and 1s22s22p63s1. The first ionization energy of one is 2080 kJ/mol and that of the other is 496 kJ/mol. Assign each ionization energy value to each of the proposed configurations. Justify your choice. 28. Based on their positions in the periodic table, select the atom with the largest first ionization energy from each of the following pairs: a) B, Cl; b) N,P; c) Hf, Cs; Don; e) Ga, Ge. 29. Define electron affinity. Electron affinity checks are normally carried out with atoms in the gaseous state. Because? 30. Arrange the elements in each of the following groups in increasing order of electron affinities a) Li, Na, K b) F, Cl, Br, I.