James Chadwick discovered the neutron in 1932.
the neutron atom
The most important contribution of Werner Heisenberg was the discovery of the uncertainty principle.
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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.
Mendeleeve formulated the Table of the Elements by listing them by their atomic weight and grouping them into 'families', with similar characteristics.
the neutron atom
Atomic Theory
That the cake is a lie.
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.
he helped the creator of electrons and the studier of chemistry
He proposed the wave-particle duality for the electrons.
His atomic theory. He was the one who thought that there were atoms in everything.
Mendeleeve formulated the Table of the Elements by listing them by their atomic weight and grouping them into 'families', with similar characteristics.