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- This atomic model has changed over time. Scientists used the model to make predictions. Sometimes the results of their experiments were a surprise and they did not fit with the existing model. Scientists changed the model so that it could explain the new evidence.
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What was Dalton's atomic model?
What did John Dalton think about atoms?
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What was John Dalton most influential work in chemistry?
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How did Dalton calculate the number of particles in an atom?
The scientist John Dalton carried out a series of experiments. He concluded that all matter was made of tiny particles called atoms.
The Dalton model has changed over time because of the discovery of subatomic particles close subatomic particle Objects found in atoms, including protons, neutrons and electrons.....
In the fourth and final part of Dalton's atomic theory, he suggested that chemical reactions don't destroy or create atoms. They merely rearranged the atoms. Using our salt example again, when sodium combines with chlorine to make salt, both the sodium and chlorine atoms still exist.
- It is also helpful to think about how science is always evolving-we are always learning new things and modifying existing theories to take into acc...
- Actually, it is. Atoms are made up of protons, neutrons, and electrons. However, if you remove any of these particles the atom will have different...
- Sodium and chlorine are toxic/explosive because they are unstable and therefore very reactive. If you look at the electrons in the shells, they wan...
- We say that an atom can't be cut in half, not because it can't actually be split (aka nuclear fission - reactor, bomb) but rather because the resul...
- To do this would require nuclear fusion (combining smaller atomic nuclei to form a larger one), a process which is not yet quite possible in the la...
- A peer reviewed journal, ERIC, published "A Historical Note on the Conservation of Mass." This states in their abstract that this is not entirely t...
- Well there are several parts to Dalton's theory. His only theory is the atomic theory and today we know that atoms can be destroyed by nuclear reac...
- Many of Dalton's original postulates of an atomic theory have had to be modified in the light of later discoveries. As far as chemical reactions go...
- in summary: element - a basic substance that can't be simplified (hydrogen, oxygen, gold, etc...) atom - the smallest amount of an element molecule...
- You cannot add protons and neutrons because they are in the center of an atom and held tighly by the strong nuclear force. However, you can add ele...
Oct 19, 2023 · Dalton’s Atomic Theory. The next stop in the ever-changing atomic theory came almost 2,000 years later, from a British chemist and meteorology enthusiast named John Dalton. He conducted experiments where he mixed two gases and observed their behavior.
- Sanjukta Mondal
- 7 min
After studying this page, you should be able to describe how the atomic model has changed over time, including: Dalton’s simple model; Thomson’s plum pudding model; the Geiger-Marsden alpha scattering experiment; Rutherford’s nuclear model; Bohr’s shell model; the discovery of subatomic particles.
By far Dalton’s most influential work in chemistry was his atomic theory. Attempts to trace precisely how Dalton developed this theory have proved futile; even Dalton’s own recollections on the subject are incomplete.
In 1804, Dalton explained his atomic theory to his friend and fellow chemist Thomas Thomson, who published an explanation of Dalton's theory in his book A System of Chemistry in 1807. According to Thomson, Dalton's idea first occurred to him when experimenting with "olefiant gas" ( ethylene ) and "carburetted hydrogen gas" ( methane ).
