Atomic History

Front

What is the Planetary Model of the atom?

Back

A model proposed by Neils Bohr that describes electrons moving around the nucleus in fixed orbits, similar to planets orbiting the sun.

Front

What does the Plum Pudding Model propose about the structure of the atom?

Back

It suggests that atoms are positive spheres with negative electrons embedded within them, like plums in a pudding.

Front

What is the Quantum Mechanical Model of the atom?

Back

A model that describes the atom as having electrons in probabilistic clouds around the nucleus, rather than fixed orbits.

Front

Who proposed the Thomson's atomic model?

Back

J.J. Thomson proposed the Plum Pudding Model after discovering the electron.

Front

What is Neils Bohr known for in atomic theory?

Back

He is known for creating a model of the atom with electrons moving around the nucleus in fixed orbits.

Front

What did Dalton's atomic theory state?

Back

It stated that all matter is made of atoms, which are indivisible and indestructible particles.

Front

What is the significance of Rutherford's gold foil experiment?

Back

It led to the discovery of the nucleus and showed that atoms are mostly empty space.

Front

What did Chadwick discover?

Back

He discovered the neutron, a particle in the nucleus with no charge.

Front

What is the main difference between the Bohr model and the Quantum Mechanical model?

Back

The Bohr model has fixed orbits for electrons, while the Quantum Mechanical model describes electron positions as probabilities.

Front

What is an electron cloud?

Back

A region around the nucleus of an atom where electrons are likely to be found, according to the Quantum Mechanical model.