Uranium, with atomic number 92, is the last naturally occurring element on the periodic table
Uranium was the last naturally accuring element.
Plutonium (atomic number 94), found in extremely traces.
Uranium - 92
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Element number 6 was one of the first elements discovered, so it is not widely known who discovered it.
Peter Armbruster, Gottfried Munzenberg, and Sigurd Hofmann discovered the element Darmstadtium . The element was named after Darmstadt, Germany where it was first produced.
unbibium (122) @ Hebrew University of Jerusalem
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The first element to be discovered was probably copper or gold. They would have been discovered by hunter-gatherers or early farmers. Its discovery cannot be credited to any single person.
Francium (Atomic Number 87), the Last Discovered Natural Element
The second rarest element on Earth is unstable so it does not have a long life (22min.), but uranium is the rarest natural element and is the second heavist natural element. Actually, there are even rarer elements that last for less then fractions of a second. Some are so rare that they haven't even been discovered.
This element is technetium (Tc); but today traces of natural technetium were discovered.
The most metallic element on the planet is Francium. It is the last element to be discovered that was not made synthetically.
Uranium is only the last natural element. We know many artificial transuranic elements.
There isn't a reason for it...it just was!
The element argon was discovered in 1894.
The element "Helium" was unknown on Earth when it was discovered by spectral lines from the Sun. It was later discovered here on Earth, in Texas natural gas deposits.
Martinium is a fictional element discovered in the webcomic "Saturday Morning Breakfast Cereal". It was discovered by a husband and wife team, with the last name of Martinez.
The element Boron was discovered in Paris.
Marie Curie. Uranium was discovered in 1789 by the German chemist Martin Heinrich Klaproth working in Berlin.
Sodium is not synthetic. It is a natural element.