The Dalton's Atomic Theory

Well now I post the article on the material to grade 10 high school chemistry. Well at this keleas material, the first material is about theories of the atom, but in this discussion because the material since the first of the atom then I give information about Dalton's Atomic Theory. , Kakh you know who the first guys who first coined the name Atom? yaaaa answer is Dalton. It was he who first initiated the terms atom. This theory becomes a theory oldest and most basic theory of an atom. Now for more details, please understand the following explanation:

Dalton's theory is the basic theory, this theory is not perfect. But anyway, Dalton's theory is the beginning of opening our horizons about the materials, objects and more about the chemical elements. So the material on the theory dalton is essential to provide a basic overview or initial thoughts about the material (object) from the point of view of scientists. Definition according dalton atom is used as a reference in the development of further experiments to elaborate on the nature of the material

Dalton atomic theory proposed by John Dalton, a school teacher in the UK who are interested in studying the laws of chemistry. From the results of studying the laws of chemistry and some scientific experiments are carried out, John Dalton's Atomic Theory Dalton publish in 1808.

Some important points regarding the atom described by Dalton's Atomic Theory popularly known as Dalton's argument, which include:
* All material (object) consists of the smallest parts can not be in for-for (splits) again called Atom
* Atom same chemical element is identical (similar / same) of each other. But the atoms of the different elements with atoms of other elements. Examples: The carbon atom on the sugar will be the same as the carbon atoms contained in the wood
* Atoms can not be created nor be destroyed
* Atoms of an element can combine with atoms of other elements with a certain ratio to form compound
* Atoms can join the same element in two or more ratios to form two or more compounds.
* Atom is the smallest unit of matter (objects) that influence the chemical reaction

Dalton atomic theory has several advantages that can explain more about the matter. Some of the advantages dalton atomic theory is:
* Has provided a reasonable explanation of the combination of chemical elements
* Provide clear boundaries and differences between elements (atoms) to the compound (molecule)

In the next development of the atom, to include a variety of experiments, the dalton atomic theory seems to have some weaknesses and shortcomings. Among the weaknesses dalton atomic theory is:
* In development turns Atom can be subdivided into protons, neutrons and electrons.
* Atoms of the same element can be different in terms of mass, such as atoms are called isotopes
* A statement that the atoms of different elements are different in every respect. It is wrong because a few different atoms could have similarities in terms of atomic mass.
* A statement that the different atoms combine in simple ratios to form compounds, whereas there is a complex organic compounds that do not join in simple ratios.
* Dalton atomic theory fails to explain the existence of allotropes. The difference between the properties of charcoal, graphite and diamond are all different properties but are formed from the same carbon atoms.

Now that's an explanation of the atomic theory dalton, hopefully you understand and know exactly how excess and lack of theory and can find chemical theory is the most correct? nah you can also find in the article about the theory selanjunya
Thomson J.J atom, Ruterford, and Neils Bohr.

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