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 Form 2 Chemistry Questions and Answers on Chemical Families

The figure is a section of the periodic table. Study it and answer the questions that follow. The letters do not represent the actual symbols of the elements.
(a) (i) Select elements which belong to the same chemical family.
(ii) Write the formulae of ions for elements in the same period.
(b) Write first ionsation energies of two elements K and M at random are 577kJ/mol and 494kJ/mol.
(i) Write the equations for 1st ionasation energies for elements K and M and indicate their energies. (ii) Explain the answers in (b) (i)

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