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The smallest unit of matter is the atom.

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Mossie Auer

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1y ago
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14y ago

Atomic theory proposed by John Dalton

Dalton's theory was based on the premise that the atoms of different elements could be distinguished by differences in their weights. He stated his theory in a lecture to the Royal Institution in 1803. The theory proposed a number of basic ideas:

All matter is composed of atoms

Atoms cannot be made or destroyed

All atoms of the same element are identical

Different elements have different types of atoms

Chemical reactions occur when atoms are rearranged

Compounds are formed from atoms of the constituent elements.

Using his theory, Dalton rationalised the various laws of chemical combination which were in existence at that time. However, he made a mistake in assuming that the simplest compound of two elements must be binary, formed from atoms of each element in a 1:1 ratio, and his system of atomic weights was not very accurate - he gave oxygen an atomic weight of seven instead of eight.

Despite these errors, Dalton's theory provided a logical explanation of concepts, and led the way into new fields of experimentation.

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13y ago

elements are composed of indivisible atoms and all atoms of a given element are identical and atoms of different elements are different that is they have different and have different masses and compound are formed by the combination of atoms of different element

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Q: What did Dalton's atomic theory state?
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Related questions

How does Daltons atomic theory explain the law of definite proportions?

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How did daltons atomic theory lead to the different model scientists have today?

Dalton's theory was irrelevant to the total compensation of of the Atomic Mass.


Why scientists accepted daltons atomic theory but not the idea of an atom proposed by the Greek philosopher?

the Greek Philosophers did not test their theory.


Did daltons atomic theory include the idea that all atoms of all elements are the same size?

no.


Which tenet of Daltons atomic theory did Thomson disprove?

Atoms cannot be divided into smaller particles.


What experiment did daltons use for his atomic theory?

dalton wasnt the one who experimented with gold, rutherford was the one who did the gold foil experiment.


How can an stm help improve daltons theory?

How can an STM help prove Daltons theory


What was one main point if daltons atomic theory?

ttha atoms made up pthe smallest forms of matter


Did postulate 4 of Daltons atomic theory holds true now?

This postulate is valid today only in some situations.


Why was daltons model accepted?

Dalton's atomic theory or model was accepted despite errors. This is because his theory provided a logical explanation of concepts and led the way to new experimentations.


How is the modern atomic theory different from Daltons atomic theory?

In Dalton's theory the electrons in the atom travel in a one layered orbital rotation around the nucleus, in the modern, or electron cloud, theory the electrons travel in a more radical patterned movement while still staying in their respected energy levels.


If all four postulates of Daltons atomic theory are correct what would change about the boxes on the periodic table and Why?

Are you doing this for a "cumulative take home exam"?