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.