Which postulates of Dalton's atomic theory can explain the Law of definite proportion? A) All matter is made of very tiny particles called atoms. B) Atoms of a given element are identical in mass and chemical properties. C) Atoms are indivisible particles and cannot be created nor destroyed. D) The relative number and kind of atoms in a given compound remain constant.

The postulate of Dalton's atomic theory that can explain the Law of definite proportion is:

D) The relative number and kind of atoms in a given compound remain constant.

The Law of definite proportion states that a compound always contains the same elements in the same proportion by mass, regardless of the source or the method of preparation. This law is explained by Dalton's atomic theory, particularly the postulate that atoms combine in fixed ratios to form compounds. According to this postulate, when elements combine to form a compound, they do so in specific whole-number ratios, which leads to the constant proportions observed in compounds. This postulate supports the concept of definite proportions observed in chemical compounds.