What was Rutherford's contribution to the atomic theory?

Answer 1

Rutherford devised an experiment where alpha particles were fired at a very thin sheet of gold leaf. His detectors were at first place behind the foil and a large number of protons were detected as flashes of light on the detector. Slowly they were brought to the side of the foil and still his staff were detecting protons. He then placed the detector beside the proton 'gun' and very occasionally detected a particle. His hunch had paid off. He likened this event as 'firing a 7 inch shell at a piece of tissue paper and it coming straight back'. What he had found was the Nucleus of an atom of gold. The positively charged proton had met with the positively charged nucleus of the gold atom and it had been rebounded due to like charges repelling . Looking at his data he reasoned that the Nucleus was surrounded by a relatively large void before the electron cloud was encountered. He likened the relative size of the atomic nucleus to the distance to the electrons as the 'fly in the cathedral'. Neils Bohr went on to further refine this model.

Answer 2

The five main points of John Dalton's atomic theory are as followed:

• Elements are made of tiny particles called atoms.
• All atoms of a given element are identical.
• The atoms of a given element are different from those of any other element.
• Atoms of one element can combine with atoms of other elements to form compounds. A given compound always has the same relative numbers of types of atoms.
• Atoms cannot be created, divided into smaller particles, nor destroyed in the chemical process. A chemical reaction simply changes the way atoms are grouped together.

Answer 3

Thomas Young was a British scientist who made many very significant contributions to the field during his life. He was not very popular as many of his idea went against Newton. However, he did contribute to a variety of theories including light and wave. He did not work on the atomic theory that was Llewellyn Thomas.

Answer 4

John Dalton was the person who published and established the legendary atomic theory. It is one of the most classic theories of modern chemistry. For details you can take help of any search engines.

Answer 5

he proposed that electricity was made out of discrete negative particles he called ELECTRONS

Answer 6

Rutherford was the first scientist to declare an atomic with a nucleus and rotating electrons.

Answer 7

Examples of scientists: Democritus, Dalton, Thomson, Bohr, Rutherford, etc.

Answer 8

Discovered the nucleus