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Dalton believed that atoms were tiny indestructable units which were solid particles. We now know that atoms contain mostly empty space and are composed of a postively charged nucleus which contains protons and neutrons bonded together, and that the nucleus is surrounded by a cloud of negatively charged electrons whose cloud shape is deteremined by the probabilities of where the electrons are most likely to be located.
Atomic Theory
Dalton's atomic model is one of the fundamentals of physics and chemistry. This theory of atomic composition was hypothesized and partially confirmed by the English chemist and Physicist John Dalton. Dalton came with his Atomic theory as a result of his research into gases. He discovered that certain gases only could be combined in certain proportions even if two different compounds shared the same common element or group of elements. Through deductive reasoning and experimentation, he made an interesting discovery. His findings led him to hypothesize that elements combine at the atomic level in fixed ratios. This ratio would naturally differ in compounds due to the unique atomic weights of the elements being combined.
This was a revolutionary idea but further experimentation by himself and others confirmed his theory. The findings became the basis of of Dalton's Atomic Laws or Model. These laws focus on five basic theorems. First, Pure Elements consist of particles called atoms. Second,atoms of an element are all the same for that element. That means gold is gold and oxygen is oxygen down to the last atom. Third, atoms of different elements can be told apart by their atomic weights. Fourth, atoms of elements unite to form chemical compounds. Finally, atoms can neither be created or destroyed in chemical reaction. The grouping only changes.
The last of Dalton's atomic laws were at the time considered true for all reactions involving atoms. This was later corrected with the discovery of nuclear fission and fusion. So we now know that this only holds true for chemical reactions.
Like other scientific theories, Dalton's atomic model has been perfected over time with the research and discoveries of other scientists. We now know that the atom can be divided into even smaller particles and we have even discovered the actual internal structure of the atom, even able to view it through modern technology. We now know that atomic weight is a product of the structure of the atoms as well.
This atomic theory made possible modern chemistry and physics. Up until Dalton's time the atom was only considered to a philosophical construct passed down by the ancient Greeks. Dalton's ground breaking work made theory reality. This understanding the atom helped to fuel many other discoveries such as the fundamental forces and Einstein's theory of relativity. It is especially is important when one goes into Quantum physics a discipline that looks at physics at the atomic and subatomic levels.
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The scientist who thought the atom was hard solid ball was?
The scientist who first proposed the idea of the atom as a hard solid ball was John Dalton in the early 19th century. Dalton's atomic theory described atoms as tiny, indivisible particles that made up all matter.
Who is model of the atom has no subatomic particles?
The model of the atom with no subatomic particles is the Dalton model, proposed by John Dalton in the early 19th century. In this model, atoms were considered indivisible and the smallest building blocks of matter. Subatomic particles like protons, neutrons, and electrons were not discovered until much later.
What ideas about the atom did Democritus and John Dalton share?
Democritus and John Dalton both believed that atoms were indivisible and made up all matter. They shared the idea that atoms were small, solid particles that could not be divided further.
Who proposed the idea that everything is made of atoms?
It was John Dalton in the early 1800s.
Who discovered the indivisible solid sphere model?
The indivisible solid sphere model, also known as the billiard ball model of the atom, was proposed by John Dalton in the early 19th century. He suggested that atoms are indivisible spheres that make up all matter and that they combine in simple whole number ratios to form compounds.
Where did john Dalton find the atom?
john dalton didnt find the atom democrites did... john dalton was reading and found the word atomos in a journal and decided he would change the name to atom meaning undivisible.
Did John Dalton's model of the atom look like a tiny solid sphere with a predictable mass for a given element?
I think it probably looked like a sphere. not positive.
Who came up with the 4-part atomic theory in 1805?
The first person to develop the first model of the atom in 1803 was John Dalton.
When did john Dalton dicover the atom?
in 1803
When John Dalton date of discovery?
John Dalton discovered the atom in 1803. He didn't really discover the atom. He developed a theory of matter that involved atoms. Atoms were proved to exist later.
Who formed the atomic theory model of the atom and was an English schoolteacher?
John Dalton
Who discovered atom before John Dalton?
democritus
Who is the scientist discovered the atom?
John Montgomery Dalton
Who came up with the atom theory?
John Dalton
Did john Dalton discover anything new about the atom?
no
When was atom is discovered?
The atom was discorvered by john dalton in the early 1800's
What did john Dalton combine with the Greek theory of the atom?
John Dalton put forward the idea that each element is made of a different sort of atom. Each kind of atom had its own properties such as an individual mass.
