Who suggested the billiard bill model and what were his conclusions about the structure of an atom?

John Dalton.The atom is indestructible and indivisible; the atoms of a same element are all identical, and the atoms of different elements are different.

Explanation:

Billiard Ball Model is the name used for the model of the atom proposed by John Dalton (1766 - 1844)

The use of this name is to refer the fact that the atom was depicted as a tiny solid and indivisible particles.

Dalton's conclusions about the structue of the atom and the matter were:

All elements are made up of atoms.The atoms are indivisble and cannot be either created or destroyed.All atoms of the same element are identical: the same size, shape, and massThe atoms of different elements are different.Atoms of different elments combine in definite whole number ratios to form the different compounds.In a chemical reaction, the atoms separete, join or rearrange but the atoms are not transformed into different kind of atoms.

They are all full and don't need any more electrons in there outer shell.