Entity: ATOM
An atom is the smallest unit of matter that retains the properties of an element, consisting of a nucleus containing protons and neutrons, surrounded by electrons.
ATOM
Etymology
The term 'atom' originates from the Greek word 'atomos,' meaning indivisible.
Definition
An atom is the smallest unit of matter that retains the properties of an element, consisting of a nucleus containing protons and neutrons, surrounded by electrons. It is the fundamental building block of all chemical elements.
Historical Context
The concept of atoms dates back to ancient Greek philosophers such as Democritus and Leucippus. Modern atomic theory was developed in the 19th century by scientists like John Dalton.
Cultural Significance
Atoms play a crucial role in understanding the composition and behavior of matter, influencing various scientific disciplines such as chemistry and physics.
Related Concepts
- Molecule: A group of atoms bonded together
- Subatomic Particles: Protons, neutrons, and electrons
See Also
A fundamental unit of matter, composed of a nucleus and electrons, that is the basic building block of all chemical elements.