Q1.   Use subshell notation to show electron arrangements in:

i) Kr                                  ii) F^–                         iii) N^3- 

iv) K⁺                                      v) S^2-                       vi) Li⁺  

Q2.    Write an equation to show the third ionization energy of aluminium

Q3.   The first six ionisation energies of an element in period 3 are 787, 1577, 3232, 4356, 16091, and 19805 kJmol^-1.

i) Identify the element, explaining your reasoning.

ii) Predict the value of the seventh ionisation energy, explaining your reasoning.

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