occurrence of gold

Hydrogen occurs in free and combined state. It is found trapped in certain rocks and minerals, mixed with natural gas in gold mines and in traces in volcanic gases. The sun and most of the stars are made of free hydrogen. It is the nuclear fusion of hydrogen atoms which produces lar..

Metals occur in nature in the free as well as in the combined states. The most unreactive metals i.e. which are not affected by air and water, like silver, gold and platinum are generally found in the free state. Most metals however, are found in the combined form as minera..

Occurrence of Elements in Nature - A large number of elements occur inside or around the earth. Less reactive elements, like platinum, gold, nitrogen, oxygen etc., occur in free (native) state. Chemically active elements always occur in the combined state i.e. in the form of com..

A large number of elements occur inside or around the earth. Less reactive elements, like platinum, gold, nitrogen, oxygen etc., occur in free (native) state. Chemically active elements always occur in the combined state i.e. in the form of compounds containing that element. For ins..