Yes
Uranium is a metallic element and is not classified as an acid or a base. It is a radioactive element that can be found in nature as uranium-238 and uranium-235 isotopes.
I believe it is Uranium. All elements heavier than uranium are man-made. Here's an interesting article... http://space.newscientist.com/article/dn13828-has-the-heaviest-element-been-found.html
No, Uranium is naturally occurring. But all elements beyond uranium are man-made.
Technetium is considered one of the most complex elements due to its unstable nature and lack of stable isotopes. It is a synthetic element that is produced in laboratories through nuclear reactions and is not found naturally in significant amounts on Earth.
Plutonium, an element not found in nature, is formed from uranium during reactor operation
Uranium - for economical exploitation - exist in mines.But uranium is is a common element in all rocks, all waters, building materials, soils etc.
Neptunium is an artificial chemical element but neptunium can be found also in the nature as a result of decay processes in uranium ores, only in ultratraces.
Fluorine is never found in nature as a pure native element due to its high reactivity. It typically forms compounds with other elements such as in minerals like fluorite.
No, but it is an element found in many minerals.
Yes, radium is found in nature as a trace element in uranium ores. It is typically found in combination with other elements in these ores, and it is not typically found in its pure, uncombined form in nature.
Radium is a radioactive element that is never found in its pure form in nature due to its highly reactive and unstable nature. It is typically found in minerals like uranium and thorium ores, and extracting pure radium requires complex and hazardous procedures.
Plutonium exist in extremely low concentrations in uranium minerals; the chemical form is probably plutonium dioxide or a complex oxide with uranium.