was chosen is because his work had information on protons‚ neutrons‚ and electrons‚ the main components that make up the atom‚ showed what the atom looks like when the three are put together‚ and had also been the discoverer of the nucleus which is the one of them most important parts of the atom’s structure. The discovery of the particles that
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most important one is‚ his discovery of the an atom’s nuclear structure The atom now consist of a positive nucleus with negative electrons in circular orbits around it. In addition to this‚ he discovered that atoms have a dense core (nucleus) where protons and neutrons are located. Along
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where nuclear forces come into play. It is the “Hydrogen Atom” of nuclear physics. It may also be viewed as the simplest odd-odd nucleus‚ having one proton and one neutron. It exhibits features which require the use of a number of new concepts such as exchange force‚ tensor force etc. Of three possible states of two nucleon system‚ di-neutron‚ di-proton‚ and deuteron only deuteron is known to be stable. Since there are only two particles in the nucleus‚ the deuteron problem can be reduced to a one
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electricity is a form of energy resulting from the existence of charged particles (such as electrons or protons)‚ either statically as an accumulation of charge or dynamically as a current. Thus‚ to describe electricity we must introduce the idea of positive and negative electrical charge‚ which is stored energy associated with particles – electrons and protons. It is tempting to think of electrons and protons as discrete‚ hard objects‚ like marbles. However‚ the physical reality is much more complicated
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contributed most to our knowledge of the structure of the atom was by Ernest Rutherford. There are more atomists such as J.J. Thomson‚ Niels Bohr‚ James Chadwick‚ Marie Curie and Henry Moseley. An atom contains three subatomic particles‚ which are protons and neutrons that are found at the center of the nucleus and around the nucleus there are electrons. There are many atomic models corresponding with the theories. Democritus "Nothing exists except atoms and empty space; everything else
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Prelab Questions 1. Neutrons were discovered in 1932‚ more than 10 years after the existence of isotopes was confirmed. What property of electrons and protons led to their discovery? Suggest a possible reason why neutrons were the last of the three classic subatomic particles to be discovered. The property that led to the discovery of electrons and protons was their charges. Neutrons were the last of the three subatomic particles to be discovered because they have no charge and therefore it was harder
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Pudding- electrons float around in a positive charged “pudding” b. Nuclear Model- atom is mostly empty space. All the positive charge and almost all the mass is concentrated in a small area in the center‚ called the nucleus. Nucleus is composed of protons and neutrons c. Planetary- electrons orbit the nucleus like planets d. Quantum-atom is found inside a blurry electron cloud 11. Scientists – Thomson‚ Rutherford‚ Millikan‚ etc. Democritus- He believed that atoms were
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Development of the periodic table ➢ The elements in the periodic table have been arranged in the order of the number of protons (a.k.a. atomic number) The next significant stage in the development of the periodic table was discovered by came from John Newlands. He arranged the known elements in order of their atomic masses. He introduced the ‘law of octaves’ which meant that every eighth element had similar properties. As it didn’t work for all the known elements it was therefore dismissed
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Prelab Questions Neutrons were discovered in 1932‚ more than 10 years after the existence of isotopes was confirmed. What property of electrons and protons led to their discovery? Suggest a possible reason why neutrons were the last of the three classic subatomic particles to be discovered. The property that led to the discovery of electrons and protons was their charges. Neutrons were the last of the three subatomic particles to be discovered because they have no charge and therefore it was harder
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with Dalton’s theory are that his second law that all atoms of the same element are the same is false because today we have found that there are other kinds of atoms called isotopes. An isotope is an atom that has the same amount of electrons and protons‚ but it has more neutrons that increase its atomic mass. Some examples of isotopes are Carbon 12‚ carbon 13‚ carbon 14‚ Uranium (234‚ 235‚ and 238) and lithium (6‚ 7). Carbon 14 is especially useful because we know its rate of decay and can use to
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