A particle that a reducing agent gives to an oxidizing agent., electron, An element that easily loses electrons., metal, The chemical element for a reddish-brown metal that does not react with hydrochloric acid, copper, The chemical element for the metal with the lowest chemical activity, gold, One of the chemical bonds, ionic, Salts are released when acid reacts with zinc... gas, hydrogen, The mass 6.02·1023 of atoms of this element is about 27 g., aluminium, A substance that is formed when a base reacts with an acid, salt, The chemical symbol for a third-period element with four valence electrons., silicon, Water containing calcium and magnesium ions., hard, The chemical symbol for an element with 26 protons, iron, A substance that contains hydroxide ions in solution., alkali, Red in acids and blue in bases, lithmus, Chemical symbol for a radioactive alkaline earth metal., radium, The chemical symbol Sn means element, tin, An ion surrounded by water molecules., hydrated.
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