GENERAL KNOWLEDGE

Detailed explanation-1: –In the periodic table there are 118 elements, all the elements (118) do not occur naturally.-The naturally occurring elements are 1-92 except Technetium (43) and promethium (61).-Means there are only 90 naturally occurring elements available in the periodic table.

Detailed explanation-2: -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.

Detailed explanation-3: -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. However, it turns out there are other elements that occur in trace amounts naturally. This brings the number of naturally occurring elements to 98.

Detailed explanation-4: -The current standard table contains 118 confirmed elements as of 2021.

Detailed explanation-5: -Of the 92 naturally occurring elements, the four major elements that make up 96% of all living things are: hydrogen, oxygen, nitrogen, and carbon.