The History of the Atom

Front

What is the correct sequence of scientists who made major changes in the model of the atom?

Back

1. John Dalton 2. J.J. Thomson 3. Ernest Rutherford 4. Niels Bohr 5. James Chadwick

Front

What does the Greek word 'atomos' translate to?

Back

Indivisible

Front

Who proposed the 'solar system' model of the atom?

Back

Niels Bohr

Front

Which scientist discovered the nucleus of the atom?

Back

Ernest Rutherford

Front

What is the 'Plum Pudding Model' of the atom?

Back

A model developed after J.J. Thomson discovered electrons, showing electrons floating freely in a positive space.

Front

What did John Dalton contribute to atomic theory?

Back

He proposed that all matter is made of atoms, which are indivisible and indestructible.

Front

What is the significance of J.J. Thomson's discovery?

Back

He discovered the electron, showing that atoms are not indivisible.

Front

What did Ernest Rutherford's gold foil experiment demonstrate?

Back

It demonstrated that atoms have a small, dense nucleus.

Front

What is the main idea of the Rutherford model of the atom?

Back

Atoms have a nucleus that contains protons and neutrons, with electrons orbiting around it.

Front

What is the main difference between the Plum Pudding Model and the Rutherford Model?

Back

The Plum Pudding Model suggests electrons are embedded in a positive 'soup', while the Rutherford Model has a central nucleus.