Atomic History

Front

Who proposed that the atom was indivisible using the word 'atomos'?

Back

Democritus

Front

What experiment did J.J. Thomson perform to discover the electron?

Back

The Cathode Ray Experiment.

Front

What significant experiment did Ernest Rutherford conduct to discover the nucleus?

Back

The Gold Foil Experiment.

Front

Which model of the atom is known as the Planetary model?

Back

Niels Bohr's model.

Front

Who is credited with the discovery of the electron?

Back

J.J. Thomson.

Front

What is the main idea of Dalton's Atomic Theory?

Back

All matter is made of atoms, which are indivisible and indestructible.

Front

What did Rutherford's Gold Foil Experiment demonstrate about the atom?

Back

Atoms have a small, dense nucleus that is positively charged.

Front

What is the significance of the term 'atomos'?

Back

It means 'indivisible' in Greek, referring to the smallest unit of matter.

Front

What did the Cathode Ray Experiment reveal about cathode rays?

Back

They are streams of negatively charged particles (electrons).

Front

What was the main contribution of Niels Bohr to atomic theory?

Back

He proposed that electrons orbit the nucleus in fixed paths or energy levels.