Question

The number of elements which can be accommodated in the present set-up of the long form of the periodic table is :

• A. $120$
• B. $118$
• C. $122$
• D. $124$

Answer 1

The correct option is B $118$

All elements from atomic numbers 1(hydrogen) to 118 (ununoctium) have been discovered or reportedly synthesized.
The last element in the sixth period is radon(86) and last element in seventh period is Uo(118).