Question

Is it possible to have an element with atomic number in fractions?

Answer 1

no it is not possible because atomic number is the number of protons in the nucleus which cannot be a fractional value.

Answer 2

$your \: answer$
atomic number is = number of protons contained in nucleus of an atom so here and no it can't be in fraction since no of protons and neutrons can not be in fraction in nucleus of an atom

hope helps