Uranium has three natural isotopes: 234, 235 and 238; also uranium has ca. 25 artificial isotopes.
No, Uranium is naturally occurring. But all elements beyond uranium are man-made.
It is a naturally occurring isotope of Uranium making 0.72% of total naturally found Uranium. Since, it is very less in nature, therefore it is sometimes made from Uranium-238 in nuclear reactors.
naturally occurring.
No - it's a man-made object. But the stuff it is made from is naturally occurring.
Osmium is the densest naturally occurring element and it is often considered the heaviest naturally occurring solid substance. However, man-made substances like depleted uranium can be even denser.
No - it's a man-made object. But the stuff it is made from is naturally occurring.
Out of the first 92 elements, 1 being hydrogen (H) and 92 being uranium (U), there are 90 that are naturally occurring. Technetium (Tc) and promethium (Pm) are man-made elements and do not have any isotopes occurring naturally.
Potassium is naturally made
The element with the largest amount of protons that is not man-made is uranium, with 92 protons. All naturally occurring elements with more protons than uranium are only found in laboratories as synthetic elements.
Phosphorus is naturally occurring. It is found in rocks
There are 94 naturally occurring elements on the periodic table. These elements range from hydrogen (1) to uranium (92), with elements 93 (neptunium) and 94 (plutonium) also occurring in nature, though less commonly.
The opposite of naturally occurring would be artificially created or man-made.