The modern atomic model includes electrons orbiting the nucleus. Which of the following parts of Dalton's atomic model was disproved by the discovery of the electron?

a.) Atoms are tiny particles.
b.) Atoms cannot be divided into smaller parts.
c.) Atoms have specific mass size.
d.) Atoms have specific chemical properties.

Question

The modern atomic model includes electrons orbiting the nucleus. Which of the following parts of Dalton's atomic model was disproved by the discovery of the electron?

a.) Atoms are tiny particles.
b.) Atoms cannot be divided into smaller parts.
c.) Atoms have specific mass size.
d.) Atoms have specific chemical properties.

anonymous · Answer

John Dalton believed that atoms were the fundamental building blocks of matter, and that they could not be created, destroyed or split. However he was wrong, because atoms are made out of subatomic particles such as Protons, Neutrons and Electrons - and later still, it was discovered Protons and Neutrons too are made of even smaller particles.