Atomic Models and History

Front

Who used the word 'atomos' to describe the indivisible atom?

Back

Democritus

Front

What subatomic particle was discovered as a result of the cathode ray experiment?

Back

Electron

Front

Which atomic model is represented by the 'plum pudding' model?

Back

Thomson's atomic model

Front

Who is considered the first contributor to atomic theory?

Back

Democritus

Front

What did Ernest Rutherford discover about the atom's structure?

Back

The atom is mostly empty space and has a positively charged nucleus.

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 J.J. Thomson discover about the atom?

Back

He discovered the electron and proposed the 'plum pudding' model.

Front

What is the significance of the gold foil experiment?

Back

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

Front

What did Niels Bohr contribute to atomic theory?

Back

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

Front

What is the charge of a proton?

Back

Positive.