State the atomic hypothesis regarding the structure of matter.

(N/A) The atomic hypothesis states that all matter is composed of tiny,indivisible particles called atoms.
Key postulates of the atomic hypothesis include:
$1$. Matter is not continuous but consists of discrete particles called atoms.
$2$. Atoms of the same element are identical in mass and properties,while atoms of different elements differ.
$3$. Atoms are the smallest units that participate in chemical reactions.
$4$. Atoms are in constant motion,and their arrangement determines the state of matter (solid,liquid,or gas).