Technetium. Element 43, no stable isotopes.
Berkelium is an artificial element.
Nobelium is an artificial element.
berkelium
No. Lithium is a naturally occurring element.
No, not the element, nor the planet, both are 'natural'
No. Sulfur is a natural element. It even occurs naturally as a native element near volcanic vents.
Mendelevium is a manmade element and does not occur naturally in nature. It is produced by bombarding einsteinium with alpha particles in a particle accelerator.
Uranium is a natural chemical element; but uranium has also and artificial isotopes.
Gold is a natural element. It is normally found as a solid metal and is relatively rare and expensive.
It is a natural element but, because it is highly reactive, pure barium is not found in nature.
Yes, curium is a manmade element produced through nuclear reactions. It was first synthesized in 1944 by researchers at the University of California, Berkeley, as part of the Manhattan Project.
The symbol for the element lead is Pb, which comes from the Latin word for lead, "plumbum."