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The ancient Greek philosophers had talked about atoms, but Dalton's theory was different in that it had the weight of careful chemical measurements behind it. It wasn't just a philosophical statement that there are atoms because there must be atoms. His atomic theory had these fundamental points :
- Elements consist of tiny particles called atoms.
- Elements are pure because all atoms of an element are identical and that in particular they have the same mass.
- Elements differ from one another because atoms of each element are different from one another; in particular, they have different masses.
- Compounds consist of atoms of different elements combined together. Compounds are pure substances (remember they cannot be separated into elements by phase changes) because the atoms of the different elements are bonded to one another somehow, perhaps by hooks, and are not easily separated from one another.
- Compounds have constant composition because they contain a fixed ratio of atoms and each atom has its own characteristic weight, thus fixing the weight ratio of one element to the other.
- Chemical reactions involved the rearrangement of combinations of the atoms in a substance.
Dalton's Atomic Theory had several main points, which are variously grouped into five statements :
1) All matter is made of atoms.
2) Atoms of a given element are identical in size, mass and chemical properties.
3) Atoms of different elements have different masses and properties.
4) Compounds are formed by a combination of two or more different kinds of atoms. The elements combine in simple, whole-number ratios.
5) Atoms cannot be subdivided, created, or destroyed, but merely rearranged in their compounds with other elements. They can be combined, separated, or changed in the way in which they are arranged.
What else can I help you with?
Who proposed john Dalton's atomic theory?
John Dalton. He put forward the atomic theory in 1808.
What is the main flaw in dalton theory?
The main flaw in Dalton's atomic theory is the assumption that atoms are indivisible and indestructible. Subsequent scientific discoveries revealed that atoms can be broken down into subatomic particles (protons, neutrons, and electrons) and can undergo nuclear reactions. Additionally, Dalton's theory does not account for the existence of isotopes, which are atoms of the same element with different masses due to varying numbers of neutrons.
When were john Dalton's ideas known?
John Dalton's ideas, particularly his atomic theory, were introduced in the early 19th century, with his seminal work published in 1803. Dalton's theory laid the groundwork for modern chemistry by proposing that matter is composed of atoms, which are indivisible and combine in specific ratios to form compounds. His concepts gained wider recognition and acceptance throughout the 1800s, significantly influencing the development of chemical science.
Who invented the atomic theory of matter?
John DaltonA2. Many scientists contributed to our present ideas - they did not (and have not yet) sprung full blown into existence. JJ Thomson et al developed some of the atomic theory, but even today the full concept of quarks and gluons may elude us - perhaps to be embodied in string theory.
Who revived the atomic theory and put on a solid experimental foundation in about 1803 by?
John Dalton revived the atomic theory in 1803 by proposing that elements were made up of tiny, indivisible particles called atoms. He also outlined basic principles of atomic theory and provided experimental evidence to support his ideas.
How did Dalton advance the atomic philosophy proposed by?
By using experimental methods Dalton transformed Democritus ideas on atoms into a scientific theory.
How did Dalton advance the atomic philosophy propose by democritus?
By using experimental methods Dalton transformed Democritus ideas on atoms into a scientific theory.
Did John Dalton's atomic theory support some of the ideas of Aristotle?
John Dalton's atomic theory did not support Aristotle's ideas; in fact, it contradicted them. Aristotle believed that matter was continuous and composed of four elements (earth, water, air, fire), while Dalton proposed that matter is made up of indivisible atoms, which are the fundamental building blocks of all substances. Dalton's theory laid the groundwork for modern chemistry, moving away from Aristotle's qualitative approach to a quantitative understanding of matter.
What was one main point of Dalton's atomic theory?
Atoms are made up of the smallest form of matter
Who proposed john Dalton's atomic theory?
John Dalton. He put forward the atomic theory in 1808.
What is the main flaw in dalton theory?
The main flaw in Dalton's atomic theory is the assumption that atoms are indivisible and indestructible. Subsequent scientific discoveries revealed that atoms can be broken down into subatomic particles (protons, neutrons, and electrons) and can undergo nuclear reactions. Additionally, Dalton's theory does not account for the existence of isotopes, which are atoms of the same element with different masses due to varying numbers of neutrons.
Did people believe john Dalton's theory's or not?
John Dalton's atomic theory was initially met with skepticism, as it challenged existing ideas about matter. However, as more evidence accumulated through experiments in chemistry and physics, his concepts gained acceptance within the scientific community. By the mid-19th century, Dalton's ideas were widely embraced, forming a foundational part of modern chemistry and our understanding of atomic structure.
When were john Dalton's ideas known?
John Dalton's ideas, particularly his atomic theory, were introduced in the early 19th century, with his seminal work published in 1803. Dalton's theory laid the groundwork for modern chemistry by proposing that matter is composed of atoms, which are indivisible and combine in specific ratios to form compounds. His concepts gained wider recognition and acceptance throughout the 1800s, significantly influencing the development of chemical science.
Who invented the atomic theory of matter?
John DaltonA2. Many scientists contributed to our present ideas - they did not (and have not yet) sprung full blown into existence. JJ Thomson et al developed some of the atomic theory, but even today the full concept of quarks and gluons may elude us - perhaps to be embodied in string theory.
What did Dalton do?
John Dalton developed the atomic theory.
What was the name of the discovery that disproved Dalton's theory?
Thomson disproved Dalton's theory because he discovered electrons.
Who revived the atomic theory and put on a solid experimental foundation in about 1803 by?
John Dalton revived the atomic theory in 1803 by proposing that elements were made up of tiny, indivisible particles called atoms. He also outlined basic principles of atomic theory and provided experimental evidence to support his ideas.
