Web Results

www.thoughtco.com/how-many-elements-found-naturally-606636

So, you may wonder how many elements can be found naturally. The usual textbook answer is 91. Scientists used to believe that, except for the element technetium , all the elements up to element 92 ( uranium ) could be found in nature.

www.thoughtco.com/how-many-elements-found-in-nature-606635

Of the 118 elements that have been discovered, there are 90 elements that occur in nature in appreciable amounts. Depending who you ask, there are another 4 or 8 elements that occur in nature as a result of radioactive decay of heavier elements. So, the grand total of natural elements is 94 or 98.

www.wisegeek.com/how-many-elements-on-the-periodic-table...

Elements are considered to be “naturally occurring” when they can be found in nature, rather than needing to be created in a laboratory, and many representations of the periodic table of the elements include a dividing line between natural and artificially produced elements. Some naturally occurring elements have very unstable isotopes or ...

www.answers.com/Q/How_many_elements_occur_naturally_in_nature

Clarification needed: How many are found un-bound (pure) in nature? For example: pure gold nuggets, atmospheric nitrogen, etc. Or how many are naturally occurring on Earth (even if they're in ...

www.answers.com/Q/How_many_naturally_occurring_elements...

First of all, let's realize what the term "not naturally occurring" means. The natural abundance of 85-Astatium is estimated to be around 10 -24 %, which gives the content of this element on Earth ...

www.quora.com/How-many-naturally-occuring-chemical...

Elements 1 through 92 (except for elements 43 and 61) occur naturally on Earth, although some are only present in extremely small quantities. The elements following uranium on the periodic table are only produced artificially, and are known as the transuranium or transuranic elements. Naturally-Occurring Elements - Angelo State University

en.wikipedia.org/wiki/Native_metal

The others usually occur as isolated pockets where a natural chemical process reduces a common compound or ore of the metal, leaving the pure metal behind as small flakes or inclusions. Non-metallic elements occurring in the native state include carbon and sulfur.

www.angelo.edu/faculty/kboudrea/periodic/physical_natural.htm

Elements 1 through 92 (except for elements 43 and 61) occur naturally on Earth, although some are only present in extremely small quantities. Element 43, Technetium (Tc), is unstable, and all of its isotopes have relatively short half-lives, ranging from 4.2 million years (98 Tc) to 5.0 seconds (108 Tc). A half-life of 4.2 million years may ...

www.quora.com/An-element-which-occurs-in-free-state-in...

An element feels it fine to occur in free state if it is stable and do not need to combine for its stability. Any element prefers a combined state over free state because it has incomplete octet.If element would have complete octet, it will stay in free state.

scienceline.ucsb.edu/getkey.php?key=3368

Only the first 98 are known to occur naturally on earth, the rest have been made synthetically. About 32 of them occur on earth as pure elements, and the rest occur in combinations in compounds. Only 80 of the elements are stable. (An unstable element undergoes radioactive decay to form a lighter, stable element).