Answer:
Option B
Explanation:
Une is a synthetic chemical element with the symbol Mt( Meitnerium) and its atomic number is 109
Because in one , U= un, ie 1, n=nil , ie, 0
e= enn, i.e ,9
Its comes under d-block trans actinide elements. It is an extremely radioactive synthetic element that is not found in nature and synthesised in the laboratory
