Which postulate of Dalton's atomic theory was later proven wrong?
a. Atoms of different elements combine to form compounds
b. Compounds contain atoms in small whole-number ratios
c. Atoms can neither be created nor destroyed
d. All atoms of an element are identical and have the same properties
e. No correct answer

Option c and d

Explanation:

John Dalton. In 1808, John Dalton proposed a theory known as Dalton’s Atomic Theory. The theory was published in a paper titled “A New Chemical Philosophy”. This theory was new to that era

The 5 postulates of Daltons' atomic theory are:

1. All the matters are made of atoms.

2. Atoms of different elements combine to form compounds

3. Compounds contain atoms in small whole-number ratios

4. Atoms can neither be created nor destroyed . (This was later proven wrong )

5. All atoms of an element are identical and have the same properties (This was later proven wrong as atoms of same element may be different in case of elements having isotopes )

Therefore, options c and d are the answer.

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b.final