Oh no....A metal combined with oxygen gives a metallic oxide. For example: 4Na + O2 --> 2Na2O Another one: acid + base --> salt + water This is a double-displacement reaction (neutralization, to be more exact). metallic oxide + water --> metallic hydroxide CaO + H2O --> Ca(OH)2 :)
A metal replaces another metal from it's compound if this metal is more reactive than the one present in the metallic compound. The reaction of a metal with a metal compound results in a new metal compound, with the original metal present in the compound replaced by the reactant metal, IF AND ONLY IF this metal lies above the metal present in the metallic compound in the reactivity series. This can be written as: If a metal say metal1 reacts with a compound of another metal, say metal 2, then the reaction can be written as: Metal1
