Although all parts (postulates)of Dalton's atomic theory are important,which one of the postulates is crucial to explain the observations summarized by the Law of Definite Proportions?
A)Matter is composed of atoms.
B)Atoms of the same element have the same properties.
C)Atoms combine with other atoms in fixed, whole number ratios to form compounds.
D)Atoms are very small.

Question

Quizplus · Accepted Answer

The Law of Definite Proportions states that a given compound always contains exactly the same proportion of elements by mass. This observation can be explained by Dalton's postulate that atoms combine in fixed, whole number ratios to form compounds. Without this postulate, it would be difficult to explain why compounds always have the same proportions of elements.

Although All Parts (Postulates)of Dalton's Atomic Theory Are Important,which One