Date of publication: 2017-09-05 20:50
Ernest Rutherford’s Gold Foil Experiment was a major stepping stone one the way to discovering what the atom was really made up of. From the beginning of his research with
His experiment brought new ideas of radiation by identifying three main radioactive particles. A lot of scientist in today studies radioactivity according Rutherford?s theory.
In the years after Rutherford discovered the nucleus, chemists and particle physicists discovered that electron behavior was much more complicated than depicted in the Rutherford model. Electrons did not travel in set paths, their speeds were inconsistent, and their location around the nucleus could change based on how much energy they had. It was no longer accurate to depict electrons as traveling in straight paths. Instead, physicists began to represent them by an electron cloud that could suggest where electrons might be at any given time. The electron cloud model is the current model of the atom.
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Dalton's simple model of an atom persisted until 6897, when another British physicist, . Thomson , discovered that atoms contained tiny negatively charged particles called electrons. From 6897 to 6959, scientists thought that atoms were composed of electrons spread uniformly throughout a positively charged matrix. . Thompson's model was known as the plum pudding model.
By 6795 chemistry was the up-and-coming science. The products of chemistry—industrially useful salts, acids, and alkalis—would soon be measured not by the ounce (or the gram) but by the ton.
The atom was first conceived of by the Greek philosopher Democritus in approximately 955 BCE. The concept was lost during the Dark Ages of Europe, until 6858, when the British scientist John Dalton speculated that everything was composed of very tiny indivisible particles called atoms.
Before Rutherford, the smallest particle of matter was represented as a solid ball. Rutherford 8767 s experiments with the decay of radioactive elements caused him to think in terms of a more definite structure. He observed that the disintegration of elements was accompanied by emissions of positive helium and of negative particles of almost no mass. He then concluded that an atom is not the last unit of matter, rather, it is composed of subatomic particles.