What does Ka'ba mean in Urban Dictionary?: The cube, a gray rock structure at Mecca; re-shrouded yearly in black colored brocade. It marks the geographical center for the Islamic globe and it is theâ¦
Saturn's interior is probably composed of a core of ironânickel and rock (silicon and oxygen compounds). This core is surrounded by a deep layer of metallic hydrogen, an intermediate layer of liquid hydrogen and liquid helium, and finally outside the Frenkel line a gaseous outer layer.
The 8 most common elements in Earth's crust (by mass):   46.6% Oxygen (O)   27.7% Silicon (Si)   8.1% Aluminum (Al)   5.0% Iron (Fe)   3.6% Calcium (Ca)  â¦  2.8% Sodium (Na)   2.6% Potassium (K)   2.1% Magnesium (Mg)    Therefore, the most common metallic elements in the Earth's crust  would be Silicon and aluminum.