Front

What is the basic unit of matter?

Back

An atom is the basic unit of matter, consisting of protons, neutrons, and electrons.

Front

What are protons?

Back

Protons are positively charged particles found in the nucleus of an atom.

Front

What are neutrons?

Back

Neutrons are neutral particles found in the nucleus of an atom, contributing to its mass.

Front

What are electrons?

Back

Electrons are negatively charged particles that orbit the nucleus of an atom.

Front

What is the nucleus of an atom?

Back

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

Front

Who proposed the Plum Pudding Model?

Back

J.J. Thomson proposed the Plum Pudding Model, which suggested that atoms are made of a positive 'soup' with negatively charged electrons scattered throughout.

Front

What did Ernest Rutherford discover?

Back

Ernest Rutherford discovered the nucleus of the atom through his gold foil experiment, demonstrating that atoms have a dense positive core.

Front

What is the charge of a proton?

Back

A proton has a positive charge.

Front

What is the charge of an electron?

Back

An electron has a negative charge.

Front

What is the charge of a neutron?

Back

A neutron has no charge (it is neutral).