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History of atomic theory. The current theoretical model of the atom involves a dense nucleus surrounded by a probabilistic "cloud" of electrons. Atomic theory is the scientific theory that matter is composed of particles called atoms. The definition of the word "atom" has changed over the years in response to scientific discoveries.
Based on all his observations, Dalton proposed his model of an atom. It is often referred to as the billiard ball model. He defined an atom to be a ball-like structure, as the concepts of atomic nucleus and electrons were unknown at the time.
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Why did Aristotle ignore atomic theory?
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Dalton based his theory on the law of conservation of mass and the law of constant composition. The first part of his theory states that all matter is made of atoms, which are indivisible . The second part of the theory says all atoms of a given element are identical in mass and properties .
- Why is Daltons theory still taught if it is not 100% accurate?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...
- Why is not possible to further separate atoms??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...
- In part 3 of the article,(Compounds are combinations of 2 or more different atoms) how is it possibl...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...
- Why can't there be half an atom? And why are chemists so sure?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...
- cant we put protons (h+) into a nucleus of he (he+) to get nucleus of an new elementTo 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...
- Didn't Antoine Lavoisier propose the law of conservation of mass?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...
- Did Dalton make up another theory that we can use instead of the one that was originally created?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...
- well as far as I understand this concept,atoms cannot bee further divided but we know that atoms are...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...
- What is the difference between an element and molecule?in summary: element - a basic substance that can't be simplified (hydrogen, oxygen, gold, etc...) atom - the smallest amount of an element molecule...
- Why can you not add protons/neutrons/electrons to an atom?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...
Thus, Plato and Aristotle attacked Democritus’s atomic theory on philosophical grounds rather than on scientific ones. Plato valued abstract ideas more than the physical world and rejected the notion that attributes such as goodness and beauty were “mechanical manifestations of material atoms.”
Sep 20, 2022 · Aristotle disagreed with Democritus and offered his own idea of the composition of matter. According to Aristotle, everything was composed of four elements: earth, air, fire, and water. Deomcritus' theory better explained things, but Aristotle was more influential, so his ideas prevailed.
Aug 23, 2005 · In late antiquity, the Neoplatonist Proclus defended Plato’s account against Aristotle’s objections; these arguments are preserved in Simplicius’ commentary on Aristotle’s On the Heavens. Simplicius credits the Pythagoreans as well as Plato with a theory composing bodies from plane surfaces.
Because of the influence of Aristotle, who did not agree with Democritus and other proponents of atomic philosophy, this theory was basically ignored for nearly 2,000 years. Dalton’s atomic model See how John Dalton built his atomic theory on principles laid out by Henry Cavendish and Joseph-Louis Proust
