well i have made some thing that separates oxygen and hydrogen from water
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Oxygen has a negative two charge. Therefore it will be attracted to anything that has a positive charge.
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Water can be separated into its component elements (hydrogen and oxygen) by the process called electrolysis (lysis means to split, electro means electricity - to split a compound by using electricity.)
When split apart, the hydrogen's are positively charged and move to the negative terminal or electrode. The oxygen's are negatively charged and move toward the positive terminal or electrode. At the electrodes the hydrogen ions gain electrons to become hydrogen atoms and the oxygen ions loose electrons to be come oxygen atoms. During electrolysis, you will notice twice as many bubbles at the cathode (the negative terminal) than the bubbles at the anode (the positive terminal) because water contains twice as many hydrogen atoms as oxygen atoms.
When split apart, the hydrogen's are positively charged and move to the negative terminal or electrode. The oxygen's are negatively charged and move toward the positive terminal or electrode. At the electrodes the hydrogen ions gain electrons to become hydrogen atoms and the oxygen ions loose electrons to be come oxygen atoms. During electrolysis, you will notice twice as many bubbles at the cathode (the negative terminal) than the bubbles at the anode (the positive terminal) because water contains twice as many hydrogen atoms as oxygen atoms.