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Which scientist thought atoms were the smallest particle in the universe?
Democritus, the ancient Greek philosopher, was the first scientist to propose the concept of atoms as the smallest particle in the universe. He believed that all matter was made up of indivisible and indestructible particles called atoms.
Who was the first scientist to discover atoms?
Centries ago , a Greek philosopher , Democritus belived , that all matter was composed of extremely small particles to which he give the name Atomos meaning not to divide. During the early nineteeth centry an English scientist John Dalton , did some carefull experiment. His results convinced that atoms were not all alike .They differ in size , mass , and chemical behaviour , for example oxygen atoms are bigger and greater than hydrogen atoms.
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.
What scientist said matter is made of atoms?
The scientist who first proposed that matter is made of atoms was John Dalton, in the early 19th century. Dalton developed atomic theory to explain chemical reactions and the behavior of gases.
Which scientist performed the first induced transmutation reaction?
Ernest Rutherford was the first scientist to perform an induced transmutation reaction in 1919 by bombarding nitrogen gas with alpha particles to create oxygen and hydrogen.
Which scientist thought atoms were the smallest particle in the universe?
Democritus, the ancient Greek philosopher, was the first scientist to propose the concept of atoms as the smallest particle in the universe. He believed that all matter was made up of indivisible and indestructible particles called atoms.
Who observed streams of negative charged particles?
Streams of negatively charged particles, known as electrons, were first observed by British physicist J.J. Thomson in 1897. His experiments with cathode rays demonstrated that these particles were much smaller than atoms and had a negative charge. This discovery was pivotal in the development of atomic theory and led to the understanding of the structure of atoms.
Which british scientist first disvored atoms and nucleus?
british scientist discovered the nucleus
What was the name of the scientist that first postulated the theory of atomic structure?
The scientist who first postulated the theory of atomic structure was John Dalton. He proposed his atomic theory in the early 19th century, suggesting that elements are composed of indivisible particles called atoms.
What evidence supported thomsons hypothesis that the negative particles he observed from inside atoms?
Thomson had two pieces of evidence: 1- No matter what metal he used for the disk, the particles produced were indentical. 2- The particles had about 1/2000 the mass of a hydrogen, the lightest atom. These experiments provided the first evidence that atoms are made of even smaller particles.
Who was the English scientist that said all matter is made up of a relatively small number indivisible particles called atom?
The English scientist who proposed that all matter is made up of indivisible particles called atoms was John Dalton. He introduced his atomic theory in the early 19th century, which laid the foundation for modern chemistry.
What evidence supported Thomson's hypothesis that negative particles he observed came from inside atoms.?
Thomson had two pieces of evidence: 1- No matter what metal he used for the disk, the particles produced were indentical. 2- The particles had about 1/2000 the mass of a hydrogen, the lightest atom. These experiments provided the first evidence that atoms are made of even smaller particles.
Who was the first scientist to discover atoms?
Centries ago , a Greek philosopher , Democritus belived , that all matter was composed of extremely small particles to which he give the name Atomos meaning not to divide. During the early nineteeth centry an English scientist John Dalton , did some carefull experiment. His results convinced that atoms were not all alike .They differ in size , mass , and chemical behaviour , for example oxygen atoms are bigger and greater than hydrogen atoms.
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.
Describe the discovery that demonstrate for the first time that atoms are not the smallest particles of matter?
The discovery of the subatomic particles demonstrated for the first time that atoms are not the smallest particles of matter. Electron was the first subatomic particle discovered by J.J. Thomson.
What scientist is credited for discovering that atoms emit tiny negative What are the indicators of particles?
Your phrasing is rather sloppy and I have to guess what it is you are really asking, but nonetheless I have an answer. Radioactivity was first discovered by three scientists, Marie & Pierre Curie, and Antoine Becquerel. There are many ways to detect or observe radioactivity, but the simplest is that it affects photographic film as if it had been exposed. For a more sophisticated, modern observation, we use cloud chambers or bubble chambers.
Which scientist first made a model of the atom with subatomic particles?
John Dalton
