Element X has a total of 19 electrons and can react with oxygen to form an oxide. Which of the following statements is NOT true of the oxide of the element?
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When exposed to air, it slowy changes to liquid
- its solution in water conducts electricity
- Its solution in water, on evaporationm gives a white solid
- Its solution in water liberates hydroge when in contact with aluminium metal
- Its oxide, when stronlgy heated, regenerates the elements X