Answer:
D. Atoms are small and cannot be divided or destroyed
Explanation:
John Dalton postulated his theory on atoms in 1808. Some of his observations are as follows:
i. Matter is made of indivisible particles which are called atoms.
ii. Combining atoms together in fixed ratio will form compounds.
iii. In mass, size and other chemical and/or physical properties, atoms of same element are alike but differ from those of other elements.
iv. During chemical reactions, atoms are not created or destroyed. In other words, atoms are neither created nor destroyed.
Therefore, the best option is D.
