Plutonium is an artificial element; natural plutonium exist only in extremely traces.
Plutonium and xenon are radioactive elements. Plutonium is a synthetic element, while xenon occurs naturally but can also be produced synthetically. Barium and cesium are not synthetic elements but can have radioactive isotopes.
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.
Yes, xenon is a naturally occurring element found in trace amounts in the Earth's atmosphere. It is not a synthetic element.
Yes, plutonium is an artificial element, man made.
Plutonium and xenon are radioactive elements. Plutonium is a synthetic element, while xenon occurs naturally but can also be produced synthetically. Barium and cesium are not synthetic elements but can have radioactive isotopes.
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.
Plutonium is a synthetic element that is radioactive. It does not occur naturally in nature and must be artificially produced through the nuclear fission of uranium.
Yes
Aluminium is a natural chemical element.
Phosphorus is an element. It's natural.
Francium is a natural chemical element.
No, boron is a naturally occurring element that is found in the Earth's crust. It is not synthetic.