Draw up the formulas of the higher oxides and hydroxides of the elements Cr (chlorine) and K (potassium).

Since the chemical element chlorine is located in the 7th group of elements of the periodic table, the formula for the higher oxide for it will be – Cl2O7; hydroxide – ClOH.
Similarly, potassium is located in the 1st group of elements of the periodic table, and the formula for the higher oxide for it is K2O; hydroxide – KOH.




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