11. Place the atoms Na, Be, O, and I in increasing order of electronegativity. Explain your choice of order. [3 marks]
12. Place the atoms Ne, Al, and Mg in decreasing order of atomic radius. Explain your choice of order. [3 marks]
13. Place the atoms F, Ge, and N in decreasing order of ionization energy. Explain your choice of order. [3 marks]