Question

Which part of John Dalton’s theory was disproved by J.J. Thomson’s cathode-ray tube experiments?(1 point)
Responses

Atoms are small.
Atoms are small.

Atoms are indivisible.
Atoms are indivisible.

Atoms can join together.
Atoms can join together.

Atoms can form new substances.

Answer 1

The part of John Dalton’s theory that was disproved by J.J. Thomson’s cathode-ray tube experiments is:

**Atoms are indivisible.**

Thomson's experiments led to the discovery of the electron, demonstrating that atoms are made up of smaller particles, thus disproving Dalton's assertion that atoms are indivisible.