ATOMIC THEORY Meaning and
Definition
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Atomic theory is a scientific concept that seeks to explain the nature and behavior of atoms, the fundamental building blocks of matter. It is a theory that postulates the existence of atoms as the smallest indivisible units of matter, and proposes that these atomic entities combine to form different elements and compounds through various chemical reactions. Atomic theory provides a framework for understanding the structure and properties of matter at the microscopic level.
According to this theory, atoms are composed of three subatomic particles: protons, neutrons, and electrons. Protons carry a positive charge, neutrons have no charge, and electrons possess a negative charge. These particles are arranged in a specific manner within the atom, with protons and neutrons found in the nucleus at the center, and electrons orbiting around the nucleus in specific energy levels or shells.
Atomic theory also suggests that atoms are mostly empty space, with the majority of their mass concentrated in the nucleus due to the presence of protons and neutrons. It explains how atoms can combine with each other through chemical reactions, forming molecules and compounds. Additionally, the theory helps explain the behavior of atoms in physical processes such as melting, boiling, and conducting electricity.
Overall, atomic theory serves as a fundamental cornerstone of modern chemistry and physics, providing a comprehensive understanding of the nature, composition, and behavior of matter at the atomic level. Its development and refinement over centuries have greatly contributed to our knowledge and advancement in various scientific disciplines.
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• The theory that chemical compounds are formed by the union of atoms in certain definite proportions.
• The theory that all substancs are composed of atoms-of one kind only (elements) or of several different kinds grouped often in most complex fashion (compounds).
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.
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The supposed resolution of bodies into ultimate particles or atoms, and the relative proportions in which they combine in compound substances.
Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874.
Common Misspellings for ATOMIC THEORY
- ztomic theory
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Etymology of ATOMIC THEORY
The word "atomic theory" has its origins in two key components: "atomic" and "theory".
The term "atomic" comes from the Greek word "atomos", meaning "indivisible" or "uncuttable". The concept of the atom as a fundamental unit of matter was first proposed by Democritus, an ancient Greek philosopher, around the 5th century BCE. He hypothesized that all matter was composed of tiny, indivisible particles called atoms.
The term "theory" comes from the Greek word "theoria", which means "contemplation" or "observation". It refers to a systematic framework of ideas or principles that explain or predict a phenomenon. The word "theory" implies a proposed explanation that is supported by evidence and subject to further testing.
Similar spelling words for ATOMIC THEORY
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