History of Atomic Structures

Front

Who discovered that positive charged particles are in the nucleus and negative charged particles surround the nucleus?

Back

Rutherford

Front

Who proposed that electrons in atoms orbit around the nucleus similar to the way planets orbit the Sun?

Back

Bohr

Front

Which scientist used the analogy of raisins in rice pudding to describe how electrons are distributed in an atom?

Back

Thomson

Front

What is the name of the model that depicts electrons orbiting the nucleus like planets around the Sun?

Back

Bohr model

Front

Who believed that atoms were solid, indivisible spheres?

Back

Dalton

Front

What is the main component of an atom's nucleus?

Back

Protons and neutrons.

Front

What are the negatively charged particles that orbit the nucleus of an atom called?

Back

Electrons.

Front

What did Democritus contribute to the understanding of atomic theory?

Back

He proposed that matter is made up of indivisible particles called atoms.

Front

What is the significance of the Rutherford model in atomic theory?

Back

It introduced the concept of a dense nucleus surrounded by electrons.

Front

What did Thomson's model of the atom suggest about the distribution of electrons?

Back

Electrons are embedded in a positively charged 'soup'.