railway DFCCIL Junior Executive 2023 (CBT 1 & CBT 2) Mock Test General Science Chemistry Classification of Elements and Periodicity in Properties
In 1955, which synthetic element is provisionally named Mendelevium in honour of Dmitri Mendeleev, who created one of the first periodic tables?
1
Element 90
2
Element 101
3
Element 103
4
Element 106