جسم
الغاليوم
The element identified spectroscopically in 1875 whose measured properties matched Mendeleev's predictions for eka-aluminium, including a specific gravity of 5.9.
الغاليومGaeka-aluminium
جسم
The element identified spectroscopically in 1875 whose measured properties matched Mendeleev's predictions for eka-aluminium, including a specific gravity of 5.9.