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What does it mean to "discover" something?
The first person to propose that matter was made
of atoms, and then write it down, was a Greek philosopher
named Democritus. But he had no experimental proof of his
notion. Then, a number of scientists, starting probably with Newton in
the late 1600s, proposed a corpuscular, or atomic, model. But it
wasn't until the late 1700s/early 1800s that John Dalton proposed
that all matter was made of atoms and actually used it to explain
a bunch of experiments that had been done on gases, and to calculate
atomic weights of elements. However, he still hadn't PROVED that
atoms existed...he just showed that the atomic concept was useful
and helped explain a lot of data. Probably the best direct probe
of the atom was first done by Rutherford and his student, C.T.R. Wilson,
who invented the cloud chamber and used it to show that when thin
gold foil is bombarded by helium nuclei (alpha particles), the particles
are occasionally deflected by a very large angle, but usually pass
straight through. This gave rise to the realization that the gold
was composed of atoms, with a tiny nucleus at the middle which
could occasionally collide with an alpha particle and send it flying.
-prof topper
His atomic model was first because, although Democritus proposed the atomic structure, he was the first person to record a model of the structure of the atom His atomic model was first because, although Democritus proposed the atomic structure, he was the first person to record a model of the structure of the atom
What else can I help you with?
Who form the atomic theory model of the atom?
Niels Bohr is considered the founder of the modern atomic model.
How is Tho masons model different from Daltons?
Thomsons model (plum pudding model of negatively charged particles in a positive soup) differed from Daltons model. Dalton hypothesised that atoms were indivisible, the word atom comes from the Greek atomos cannot be cut)
How did thomsons atomic model differ from daltons model?
If i remember correctly, Dalton's focuses more on the nucleus while Thompson's focuses more on electrons. But I'm not sure. well in 1803 John Dalton makes a strong case that atoms are small, solid balls and Joeseph John Thompson discovers electrons, and developed plum pudding model of an atom..... Dalton says that nothings smaller than the atom, but Thompson says that electrons are.
How did thomas exsperiment change daltons atomic model?
Thomas's experiments, particularly the discovery of the electron through cathode rays, significantly altered Dalton's atomic model. While Dalton proposed that atoms were indivisible and solid spheres, Thomas's findings introduced the concept of subatomic particles, demonstrating that atoms are composed of smaller components. This led to the development of the "plum pudding" model, where electrons are embedded within a positively charged "soup," challenging the idea of atoms as indivisible entities. Ultimately, this shift paved the way for more complex atomic theories and models.
Which scientist was the first to describe an atomic model in which most of the atom is empty space?
Ernest Rutherford was the first scientist to describe an atomic model in which most of the atom is empty space. His model proposed that atoms have a dense positive nucleus surrounded by orbiting electrons in empty space.
What main feature of daltons atomic model was abandoned after thomson's discoveries?
The idea that atoms are indivisible.
When was john daltons atomic model billliard model made?
see along time ago before dinosaurs walked the earth. the end.
How did thompsons experiment change daltons atomic model?
thomas discovered that the atom contained smaller particals called electrons
How did daltons atomic theory lead to the different model scientists have today?
Dalton's theory was irrelevant to the total compensation of of the Atomic Mass.
Why was daltons model accepted?
Dalton's atomic theory or model was accepted despite errors. This is because his theory provided a logical explanation of concepts and led the way to new experimentations.
Who form the atomic theory model of the atom?
Niels Bohr is considered the founder of the modern atomic model.
How did thomsons experiment change daltons atomic model?
Thomson's experiment showed that atoms contain subatomic particles, specifically electrons. This discovery led to the modification of Dalton's atomic model, which previously considered atoms to be indivisible and uniform. Thomson's model proposed the existence of electrons within the atom.
How did Thomson's experiment change daltons atomic model?
Thomson's experiments with cathode ray tubes helped him to discover the electron (which Dalton did not know about). Dalton thought that atoms were in.
How did Thomson experiment Change daltons atomic model?
Thomson's experiments with cathode ray tubes helped him to discover the electron (which Dalton did not know about). Dalton thought that atoms were in.
How did Thomson's experiment. change Daltons atomic model?
Thomson's experiments with cathode ray tubes helped him to discover the electron (which Dalton did not know about). Dalton thought that atoms were in.
How is Tho masons model different from Daltons?
Thomsons model (plum pudding model of negatively charged particles in a positive soup) differed from Daltons model. Dalton hypothesised that atoms were indivisible, the word atom comes from the Greek atomos cannot be cut)
Why is the plum pudding model considered incorrect in the field of atomic structure?
The plum pudding model is considered incorrect in atomic structure because it was later replaced by the nuclear model, which showed that atoms have a small, dense nucleus at the center, rather than being uniformly distributed like in the plum pudding model.
