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- HI, MY I'M MARX YANCHA AND HERE IS THE TIMELINE OF ATOMIC THEORIES.
- ANCIENT GREEKThe statement all matter is composed of minute units called atoms is credited to Leucippus and Democritus in the fifth century B.C.They also state that these solid particles, which come in a variety of shapes and sizes, lack interior structure. They also created some intangible qualities such as flavor and color.
- In 1808, English chemist John Dalton based his work on the Greek concept of atoms. He proposed that matter is composed of atoms, which are tiny indivisible particles. He also proposed that, while all atoms of one element are the same, they are not the same as those of other elements.
- In 1904 an English physicist named Joseph J. Thomson proposed the plum pudding idea of the divisible atom. He does so after the discovery of electrons in 1897.Furthermore, atoms, like fruit in plum pudding, are made up of large positively charged spheres sprinkled with negatively charged electrons (which he referred to as corpuscles).Furthermore, he claimed that the positive sphere's charge is equivalent to the negative charges of electrons. Nowadays, positive charged particles are referred to as protons, and negative charged particles are referred to as electrons.
- Ernest Rutherford, a British physicist, proposed a nuclear model of atoms in 1911. a type of atom with a nucleus He previously discovered an active center region of the atom, with protons and electrons moving around. Furthermore, he proposed that an atom contained an equal number of protons and electrons.
- In 1913, Niels Bohr, a Danish physicist, proposed the planetary model, which states that electrons orbit the nucleus in the same way that planets orbit the sun. While in orbit, electrons have constant energy.When these atoms' electrons absorb energy and move into a higher orbit, this hypothesis refers to them as stimulated. When they return to their starting point, they leave this energy behind in the form of electromagnetic radiation.
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