Elements Not Found On Earth

As of 2010, there are 118 known elements (in this context, "known" means observed well enough, even from only a few decay products, to have been differentiated from whatsoever other element). Of these 118 elements, 94 occur naturally on Earth. Six of these occur in extreme trace quantities: technetium, atomic number 43; promethium, number 61; astatine, number 85; francium, number 87; neptunium, number 93; and plutonium, number 94. These 94 elements, and also possibly element 98 californium, accept been detected in the universe at large, in the spectra of stars and likewise supernovae, where curt-lived radioactive elements are newly beingness made.

The remaining 22 elements, not found on World or in astronomical spectra, take been derived artificially.

https://en.wikipedia.org/wiki/Chemical_element

Even though there are 92 elements that are naturally found, simply eight of them are common in the rocks that brand up the Earth's outer layer, the crust. Together, these 8 elements make upwards more 98% of the chaff.

The 8 most common elements in Globe'southward crust (past mass):
46.6% Oxygen (O)
27.7% Silicon (Si)
8.1% Aluminum (Al)
5.0% Iron (Atomic number 26)
three.6% Calcium (Ca)
2.8% Sodium (Na)
two.6% Potassium (K)
two.1% Magnesium (Mg)

https://en.wikipedia.org/wiki/Abundance_of_elements_in_Earth%27s_crust

Response final updated by looney_tunes on May 15 2021.