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  • ADAM!
  • Zzzzzz.....
  • Democritus’ theory led to John Dalton in 1803 who proposed an "atomic theory" with spherical solid atoms based upon measurable properties of mass. Dalton proposed 4 postulates, which are: All matter is made up of atoms. Atoms are indivisible and indestructible, all atoms of a given element are identical in mass and properties, compounds are formed by a combination of two or more different kinds of atoms, and a chemical reaction is a rearrangement of atoms. In 1897, J.J. Thomson used a cathode ray tube and used magnets, and discovered that the green beam that it produced was made from negatively charged material, which is an electron. This is called the Plum Pudding Model. In 1898, Rutherford did an experiment where he fired a beam of positively charged particles at a thin sheet of gold foil. He studied the radiations that came and named them alpha and beta. Rutherford also estimated the size of an atom and said that the mass was concentrated in the nucleus.
  • AH! Sorry Ms Mole. Cule
  • Anyway, as I was saying: Democritus was the first to come up with the theory of the atom in 400 B.C. He stated that everything is made up of “atoms” that are physically divisible, there is an infinite number of atoms that very in shape and size, between atoms lies empty space, atoms are indestructible, and atoms will always be in motion.
  • In 1922, Bohr proposed that electrons: Electrons orbit the nucleus in orbits that have a set size and energy, the energy of the orbit is related to its size. The lowest energy is found in the smallest orbit, radiation is absorbed or emitted when an electron moves from one orbit to another. In 1923, De Brogile discovered that electrons have a dual nature that is similar to particles and waves. Also, another thing worth mentioning Schrodinger’s Cat. According to quantum physics, before the box is opened, the cat is both dead and alive at the same time. When the box is opened, that is when we can see the cat either alive or dead. Now we'll be talking about protons, neutrons and electrons and where they are in terms of their mass, charges, and locations within the atom. First we will talk about the protons whose mass is 1.67262 × 10−27 kg and it has a positive charge and are located in the nucleus of the atom. Next we will talk about the neutron which has a mass of 1.674929 x 10-27 kg. It has a neutral charge and is also located in the nucleus of the atom. Now for the electron which has a mass of 9.10938356 × 10-31 kg. It has a negative charge and can be found orbiting around the nucleus. Now it's time to learn about the electromagnetic spectrum.
  • In 1922, Bohr proposed that electrons: Electrons orbit the nucleus in orbits that have a set size and energy, the energy of the orbit is related to its size. The lowest energy is found in the smallest orbit, radiation is absorbed or emitted when an electron moves from one orbit to another. In 1923, De Brogile discovered that electrons have a dual nature that is similar to particles and waves. Also, another thing worth mentioning Schrodinger’s Cat. According to quantum physics, before the box is opened, the cat is both dead and alive at the same time. When the box is opened, that is when we can see the cat either alive or dead. Now we'll be talking about protons, neutrons and electrons and where they are in terms of their mass, charges, and locations within the atom. First we will talk about the protons whose mass is 1.67262 × 10−27 kg and it has a positive charge and are located in the nucleus of the atom. Next we will talk about the neutron which has a mass of 1.674929 x 10-27 kg. It has a neutral charge and is also located in the nucleus of the atom. Now for the electron which has a mass of 9.10938356 × 10-31 kg. It has a negative charge and can be found orbiting around the nucleus. Now it's time to learn about the electromagnetic spectrum.
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