The 'Atomic Theory' of Dalton is characterized as the earliest model(came in 1803) which described the atoms as the indivisible and resistant spheres. He <u>used the example of watermelon to elaborate that the atoms of a specific element share similar characteristics</u> and the atoms of distinct elements differ in their mass as well as their size. Thus, <u>option A</u> is the correct answer.
It can be known that the Salt sample is Ionic nature and therefore is showing a Crystalline lattice such as NaCl. It consists of a metal and a non metal it will be soluble in water and would potentially have a high melting point.
