Number of naturally occurring elements
How many naturally occurring elements are there?
Science people say that of the first 92 elements on the periodic table, where 1 is hydrogen and 92 is uranium, 90 elements occur naturally. Needless to say, Technetium (atomic number 43) and promethium(atomic number 61) are man-made elements that have no naturally occurring isotopes. It is widely known the fact that the elements hydrogen, carbon, nitrogen and oxygen are the elements that make up most living organisms. There are also some other elements found in living organisms like: magnesium, calcium, phosphorus, sodium, potassium.