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He proposed the wave-particle duality for the electrons.
Instead of just stating his own personal opinions John Dalton cited evidence to support his atomic theory. The giving of evidence - which could be proved or disproved by others - was what soon resulted in his theory being accepted by scientists.
Dalton's atomic theory was a major contribution to discover the atomic structure in despite of been completely counterproved.
What important contribution did Lavoisier make to Dalton's atomic theory of matter? Lavoisier helped the atomic theory of matter, by stating that matter is not destroyed or created, it just changes form. Located inside the nucleus, has a positive charge, and 1 amu.
an atom has electrons in discrete energy levels
a new model of the atom that describe electrons as being in a cloud
Atomic Theory
That the cake is a lie.
The Albert Einstein's personality itself. (He was one of the creator of atomic bomb and participated in the project Manhattan.)
Antoine Lavoisier was a French nobleman and chemist. His contribution to the development of the modern atomic theory was his idea of the possibility of an Atomic Mass.
The most important contribution of Werner Heisenberg was the discovery of the uncertainty principle.
he contributed by creating milk
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The contribution of anyone prior to about 1600 to the development of atomic theory might as well be "nothing whatsoever." Democritus and/or Leucippus contributed the name "atomos", but not much else; they were wrong about nearly every detail. John Dalton is just about the earliest scientist to have had any significant contribution to atomic theory, and most of what we now consider atomic theory was developed since about 1900.
James Chadwick discovered the neutron in 1932.
he helped the creator of electrons and the studier of chemistry
He proposed the wave-particle duality for the electrons.