In the Free State
Very few metals exist in the free or native state. Only metals like gold, platinum and mercury are occasionally found in the free state i.e., in the pure form. Sometimes, copper and silver may also be found in the free state. Such metals are not acted upon by air or w..
Science II
Chemical Reactions and Equations - A physical change is one in which the shape, size, appearance or state, of a substance may alter, but its chemical composition remains same.A change in which the composition of a substance is altered is called as chemical chang..
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