The metallic ions (the cations) can be identify by performing flame test which is describe below.
"Make a paste of the given salt in concentrated hydrochloric acid. Load the paste on a clean platinum wire and introduce it in a non-luminous bunsen burner flame. Note the colour of the flame imparted by the flame. Tabulate your answer in the formate given below. The salt x imparts golden yellow flame. The salt y imparts lilac flame and the salt z imparts bright red flame.