The atomic number of platinum is 78 and the atomic number of gold is 79. Hence in the periodic table, gold is present just next to platinum and no element lies between the two metals. Both are present in the same period.
Noble metals like gold and platinum can be dissolved in :
Acids as we know dissolve most of the metals, but its hard dissolve the metals like gold and platinum. Can you name a special mixture of acids which dissolves noble metals like gold?