GCSE Physics - Development of the model of the atom #31

The video explores the evolution of atomic theory, starting with Democritus' idea of indivisible particles. John Dalton later described atoms as solid spheres, leading to JJ Thompson's plum pudding model, which introduced electrons. Rutherford's gold foil experiment revealed a dense nucleus, forming the nuclear model. Niels Bohr refined this with his planetary model, explaining electron orbits. Further discoveries identified protons and neutrons, shaping our current understanding of atomic structure.

Who first proposed the idea that matter is made up of indivisible particles?

• John Dalton

• Democritus

• Ernst Rutherford

• JJ Thompson

What was the key feature of JJ Thompson's plum pudding model?

• Atoms are solid spheres

• Atoms have a central nucleus

• Atoms contain electrons within a positive charge

• Atoms are made of protons and neutrons

What did Rutherford's gold foil experiment demonstrate about the structure of the atom?

• Atoms are solid spheres

• Atoms have a dense central nucleus

• Atoms contain orbiting electrons

• Atoms are made of indivisible particles

What was the main flaw in Rutherford's nuclear model?

• It did not include a central nucleus

• It could not explain why atoms do not collapse

• It suggested atoms were solid spheres

• It did not account for the existence of electrons

How did Niels Bohr's model address the issue of atomic collapse?

• By identifying neutrons in the nucleus

• By introducing the concept of protons

• By suggesting electrons orbit in fixed shells

• By proposing atoms are solid spheres