Thorium is a natural chemical element, a radioactive metal.
Actinium is a natural element but because is extremely difficult to be separated from ores it is practically obtained artificially in laboratory.
Yttrium is a natural element found in the Earth's crust. It is not a synthetic element.
Lithium is a natural element that is found in various minerals and salts in the Earth's crust. It is not a synthetic element.
No, boron is a naturally occurring element that is found in the Earth's crust. It is not synthetic.
The chemical symbol of thorium is Th.
Thorium is a natural chemical element.
Thorium is a natural chemical element.
Thorium is a natural, radioactive, chemical element; chemically, thorium is homogeneous.
Thorium is not a radiation but a chemical element, metal, natural and radioactive.
Actinium is a natural element but because is extremely difficult to be separated from ores it is practically obtained artificially in laboratory.
Yttrium is a natural element found in the Earth's crust. It is not a synthetic element.
Lithium is a natural element that is found in various minerals and salts in the Earth's crust. It is not a synthetic element.
Cadmium is a natural chemical element.
Boron is a naturally occurring element found in the Earth's crust. It is not a synthetic material.
Yes
Thorium is a natural chemical element; chemical elements were formed by stellar nucleosynthesis at the beginning of the universe.
Aluminium is a natural chemical element.