History of Atom
According to some scientists, all the atoms in the universe are created 13.7 billion years ago after the Big Bang. Initially, only electrons and quarks are created and millions of years later as the universe cools down quarks aggregated to form protons and neutrons which on further engagement created atoms. These atoms after combining form all the matter in the universe. Early Indian philosophers were the first to think that matter is made up of smaller particles and they call them “Anu” and “Parmanu”. The Greeks were also of the same view. But the modern thinking of atoms was first pioneered by John Dalton.
What is Atom?
Atoms are tiny particles that comprise all the things in the known universe. Atoms of an element are responsible for all chemical reactions occurring in nature. We know that atoms are made up of three fundamental particles namely,
- Electrons
- Protons
- Neutrons
These particles are also called subatomic particles as they are found inside atoms. An atom is the basic building block of matter and all the thing around us is made up of combing atoms in different proportions. Let’s learn more about Atom, its constituents, and its structure in detail in this article.
Table of Content
- Atom Definition
- Structure of Atom
- History of Atom
- What is the Size of an Atom?
- What is Atomic Mass?