Question

Which of the following statement is not a postulate of Dalton's atomic theory?

• A. An atom is the smallest particle and is indivisible.
• B. Atoms of all elements are identical.
• C. Atoms can neither be created nor be destroyed.
• D. Atoms take part in chemical reactions.

Answer 1

The correct option is B Atoms of all elements are identical.

According to Dalton's atomic theory:
$\bullet$ An atom is the smallest particle which cannot be divided further, i.e., it is indivisible.

$\bullet$ Atoms of the same elements are identical but differ from that of other elements.

$\bullet$ Atoms can neither be created nor be destroyed.

$\bullet$ Atoms may or may not exist independently but they take part in chemical reactions.