Atomic History

Front

Who performed the Cathode Ray Experiment?

Back

J.J. Thomson

Front

What does the continuous updating of the atomic model indicate?

Back

New information about atoms continues to be discovered.

Front

In the 'plum pudding' model, what do the plums represent?

Back

The electrons.

Front

Who proposed that electrons orbit the nucleus on fixed paths?

Back

Niels Bohr.

Front

Who was the first to propose the discovery of the nucleus?

Back

Ernest Rutherford.

Front

What is the main idea of the atomic theory?

Back

Matter is composed of atoms, which are indivisible and indestructible.

Front

What did Democritus contribute to atomic theory?

Back

He proposed that everything is made up of atoms, which are small, indivisible particles.

Front

What is John Dalton known for in atomic theory?

Back

He formulated the first modern atomic theory, stating that atoms combine in fixed ratios.

Front

What is the significance of the Rutherford gold foil experiment?

Back

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

Front

What does the term 'atomic number' refer to?

Back

The number of protons in the nucleus of an atom, which determines the element.