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Which part of Dalton's theory did Thomson's findings dispute?
The atom is the smallest known particle.
Who developed the first scientific theory of the atom?
john dalton
What is the smallest divisible particle?
the atom
Who was the first person to develop a theory of the atom based on experimental evidence?
yo gramdma
Which came first the theory of natural selection or the theory of relativity or the heliocentric theory or the theory of the the hydrogen atom?
In the following order: Heliocentric theory of the solar system (Aristarchus of Samos, 270 BCE) Natural Selection (Darwinian evolution, 1858) Theory of the hydrogen atom (as a small negatively charged particle inside a larger positively charged particle, 1904, the plum pudding model) Theory of relativity (special relativity, 1905) Theory of relativity (general relativity's initial paper on the acceleration of objects within the framework of special relativity, 1907) Theory of the hydrogen atom (as a small particle orbiting the atomic nucleus, 1909, the Rutherford or Planetary model) Theory of the hydrogen atom (as an "electron cloud" surrounding the atomic nucleus, 1913, the quantum mechanical or Bohr model) Theory of relativity (general relativity and its ability to warp space-time, 1915) So heliocentrism was, by about two millenia, the first. Relativity and the model of the hydrogen atom are intricately intertwined, so which came first depends on what you mean specifically.
Who did not have experimental evidence to support his theory of the atom?
John Dalton did not have experimental evidence to support his theory of the atom when he first proposed it in the early 19th century. His model was based on a philosophical approach rather than direct experimental observations.
Who made the first use of quantum theory to explain the structure of atom?
Niels Bohr was the first to use quantum theory to explain the structure of the atom in his atomic model in 1913. He proposed that electrons orbit the nucleus at specific energy levels, or shells, and that energy is quantized in discrete amounts.
Is the statement An atom consists of a dense nucleus surrounded by a cloud of electrons best described as a law or hypothesis or a theory?
The statement "An atom consists of a dense nucleus surrounded by a cloud of electrons" is best described as a theory in the field of atomic structure. The atomic theory explains the structure of atoms based on experimental evidence and scientific principles.
Who was the first person to propose the theory of the atom?
The idea of the atom was first proposed by the ancient Greek philosopher Democritus in the 5th century BC. He believed that everything is made up of tiny, indivisible particles called atoms.
What does the electron cloud theory state?
an atom
Jj Thomson's atomic theory?
what is atom
When did John Dalton state his theories about the atom?
The exact date that John Dalton stated his theories about the atom is unknown. However, it is believed that he first stated his theory sometime between 1800 and 1803.
