The abundance of thallium in the Earth crust is cca. 0,6 ppm.
The second most abundant element in the Earth's crust is silicon, comprising 27.8% of the crust by mass.
That element is Oxygen by 46.6%
Silicon
The fifth most abundant element in the Earth's crust is potassium. It makes up about 2.6% of the Earth's crust by weight.
Oxygen and silicon are the two most abundant elements in the Earth's crust. They make up about 75% of the Earth's crust by weight.
silicon
Aluminum 7.5 to 8.1%
chuck norris
Yes.
Aluminium
Clay and Quartz!
aluminum