History of Atomic Structure

Front

What is the Plum Pudding Model?

Back

A model proposed by J.J. Thomson suggesting that atoms are composed of negatively charged electrons scattered within a positively charged 'soup', similar to seeds in a watermelon.

Front

Who proposed the Plum Pudding Model?

Back

J.J. Thomson.

Front

What did Ernest Rutherford discover about the atom?

Back

He discovered that the atom has a small, dense, positively charged center called the nucleus.

Front

What is the Rutherford Model?

Back

A model of the atom that describes a small, dense nucleus surrounded by orbiting electrons.

Front

Who discovered the nucleus of the atom?

Back

Ernest Rutherford.

Front

What is the Quantum Mechanical Model?

Back

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

Front

Who proposed that electrons move in circular orbits around the nucleus?

Back

Niels Bohr.

Front

What is the significance of the electron cloud model?

Back

It represents the modern understanding of electron behavior, where electrons are found in regions of probability rather than fixed paths.

Front

What did John Dalton contribute to atomic theory?

Back

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

Front

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

Back

Matter is composed of atoms, which combine in simple whole-number ratios to form compounds.