Is the outer core made of solid metal?
The outer core is made of extremely low-viscous liquid that is distinctly different from liquid. So, it is is regarded as a solid core It comprises iron, nickel, manganese, gold, platinum et al.
The outer core extends from the boundary of the mantle above at about 2800 km depth to the the upper boundary of the inner core,at about 5100 km..
The metals in the outer core might exist in extreme forms of low-viscous liquid. This structure is surmised from the very slow rotation of the solid inner core of similar composition therein, at the rate of
As the temperature and pressure are extremely high, near the center, the inner core cannot exist in liquid form.