Answer:
- 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.
Step-by-step 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 mass
- The 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.