Question

wu: history of the atom
multiple answer 1 point
which of daltons postulates was/were proven wrong?
□ chemical reactions are rearrangements of atoms. atoms of one element cannot be changed into a new element during chemical reactions.
□ all matter is composed of tiny particles called atoms.
□ all atoms of an element are identical, having the same size, mass, and chemical properties.
□ atoms cannot be created, divided into smaller particles, or destroyed.
□ atoms combine in simple whole number ratios to form compounds.

Explanation:

Dalton's postulate that all atoms of an element are identical has been proven wrong due to the discovery of isotopes which have different masses. Also, the postulate that atoms cannot be divided into smaller particles is incorrect as we now know about sub - atomic particles like protons, neutrons and electrons.

Answer:

C. All atoms of an element are identical, having the same size, mass, and chemical properties.
D. Atoms cannot be created, divided into smaller particles, or destroyed.