SSC MTS EXAM

Detailed explanation-1: –Out of those 114 elements, 98 elements occur naturally and 16 elements are synthesized from the existing elements.-That means there are 114 elements after counting the naturally occurring and the synthesized elements. Therefore 114 elements have been discovered till now.

Detailed explanation-2: -Rn in the electronic configuration of element with atomic number 117 represents Radon which has atomic number 86, and Og in the electronic configuration of element with atomic number 120 represents Oganesson, which has atomic number 118. Oganesson is also known as ununoctium.

Detailed explanation-3: -On course to the island of stability, researchers initially skipped element 117 due to the difficulty in obtaining the berkelium target material.