Atomic theory – Definition & Meaning

Atomic theory is a scientific theory that explains the nature and behavior of matter. It is the foundation of modern chemistry and physics, and it is essential for understanding the properties of elements and compounds.

Definitions

Atomic theory is a scientific explanation of the behavior of atoms and molecules. It describes the structure of atoms, the properties of elements, and the interactions between atoms and molecules.

Origin

The idea of atoms has been around since ancient times, but the modern atomic theory was first proposed by John Dalton in the early 19th century. Dalton’s theory explained that all matter is made up of tiny, indivisible particles called atoms, which combine to form compounds.

Meaning in different dictionaries

According to the Merriam-Webster dictionary, atomic theory is “a theory of the nature of matter that states that matter is composed of discrete units called atoms.” The Oxford English Dictionary defines it as “the theory that all matter is composed of atoms, and that chemical reactions involve the rearrangement of atoms.”

Associations

Atomic theory is closely associated with the fields of chemistry and physics. It is used to explain the behavior of matter at the atomic and molecular level, and it is essential for understanding chemical reactions, nuclear reactions, and the properties of materials.

Synonyms

Some synonyms for atomic theory include atomic physics, atomic structure, and atomic science.

Antonyms

There are no direct antonyms for atomic theory, but some concepts that are opposed to it include the idea of continuous matter and the belief that matter is composed of smaller particles than atoms.

The same root words

The root words of atomic theory are “atom” and “theory.” Atom comes from the Greek word “atomos,” which means indivisible, while theory comes from the Greek word “theoria,” which means contemplation or speculation.

Example Sentences

1. The atomic theory explains why elements have different properties based on their atomic structure.
2. Dalton’s atomic theory was a revolutionary concept in the early 19th century.
3. Atomic theory is essential for understanding the behavior of matter at the atomic and molecular level.
4. The development of atomic theory led to significant advances in the fields of chemistry and physics.
5. The study of atomic theory requires a deep understanding of the properties and interactions of atoms and molecules.