Atomic Theory

Front

What is the main idea of J.J. Thomson's atomic model?

Back

J.J. Thomson proposed that atoms contain negatively charged electrons embedded in a positively charged 'soup', known as the 'Plum Pudding' model.

Front

What is the charge of a proton?

Back

A proton has a positive charge.

Front

What did John Dalton contribute to atomic theory?

Back

John Dalton discovered that every element consists of one type of atom.

Front

Who is known for the 'Plum Pudding' model of the atom?

Back

J.J. Thomson is best known for his 'Plum Pudding' model of the atom.

Front

What is the charge of a neutron?

Back

A neutron has no charge (it is neutral).

Front

What are the three main subatomic particles?

Back

The three main subatomic particles are protons (positive charge), neutrons (no charge), and electrons (negative charge).

Front

What is the nucleus of an atom?

Back

The nucleus is the central part of an atom, containing protons and neutrons.

Front

How did Ernest Rutherford contribute to atomic theory?

Back

Ernest Rutherford discovered that atoms have a small, dense nucleus through his gold foil experiment.

Front

What is the mass of a neutron compared to a proton?

Back

A neutron has approximately the same mass as a proton.

Front

What is the role of electrons in an atom?

Back

Electrons are responsible for chemical bonding and reactions due to their negative charge and arrangement around the nucleus.