Question

how are all the electrons distributed in the space of atom ?

Answer 1

they are distributed in the free space of an atom.In the shells and orbits and sub shells of the atom in which they rotate and revolve

Answer 2

Electrons in an atom are distributed in 'shells' witch form concentric circles around the nucleus of the Atom. The 1st, 2nd, and 3rd, she'll each hold 2, 8, and 8 electrons each.