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Dalton's Atomic Model
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Dalton's Atomic Theory
Dalton's Atomic Model
- Dalton's atomic theory was the first complete attempt to describe all matter in terms of atoms and their properties.
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Presentation by: Pauline
-The model was based on the laws of conservation of mass, constant proportions, multiple proportions, and reciprocal proportions. The model postulated that atoms are tiny indivisible spherical objects that cannot be divided any further. The model was later disproven by the discovery of the nucleus, protons, and electrons.
Who si John Dalton?
Conclusion
- Atomic theory – that is, the belief that all matter is composed of tiny, indivisible elements and has very deep roots. Scientists from the time of John Dalton (1808) until around 1895 explained that atoms were the building blocks of matter and could not be cut or divided into smaller parts. But at the start of the 20th century, this idea was disregarded because new scientific findings explained that atom can now be split into smaller parts.
- John Dalton (1766-1844) is an English meteorologist and chemist, best known for introducing the atomic theory into chemistry and for his work on human optics.
- Father of atomic theory
Dalton's Four Atomic Theories
Dalton's Atomic Model
(John Dalton)
1) All matter is made of atoms. Atoms are indivisible and indestructible.
2) All atoms of a given element are identical in mass and properties
3) Compounds are formed by a combination of two or more different kinds of atoms.
4) A chemical reaction is a rearrangement of atoms.