Atomic Theory History

Front

What is the name of J.J. Thomson's model of atomic structure?

Back

Plum Pudding Model

Front

Who created the Bohr model of the atom?

Back

Niels Bohr

Front

True or False: John Dalton believed that moving electrons exist in electron clouds around the nucleus.

Back

False

Front

Who was the first person to propose the concept of atomic theory?

Back

Democritus

Front

What fundamental elements did Aristotle propose?

Back

Earth, Air, Fire, and Water

Front

What did John Dalton contribute to atomic theory?

Back

He proposed that atoms are indivisible and that each element consists of identical atoms.

Front

What is the significance of the Rutherford gold foil experiment?

Back

It demonstrated that atoms have a small, dense nucleus and are mostly empty space.

Front

What is the main idea of the quantum mechanical model of the atom?

Back

It describes electrons as existing in probabilistic electron clouds rather than fixed orbits.

Front

What did the discovery of the electron by J.J. Thomson imply about atomic structure?

Back

It suggested that atoms are not indivisible and contain smaller particles.

Front

What is the difference between the Dalton model and the Thomson model of the atom?

Back

Dalton's model viewed atoms as solid spheres, while Thomson's model introduced the idea of electrons within a positively charged 'soup'.