The nucleus of an atom consists of

The number of moles of solute present in 1 kg of a solvent is called its

The metal used to recover copper from a solution of copper sulphate is

The metallurgical process in which a metal is obtained in a fused state is called

The oldest rocks in the earth's crust were once molten, and came from deep inside the earth. The molten rock, called magma, spewed out in volcanic eruptions during the earth;s early life and solidified into hard rock's called