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Why the outer shells of an atom have more energy than inner shells?why is electron negatively charged?

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Why the outer shells of an atom have more energy than inner shells?why is electron negatively charged?

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Why the outer shells of an atom have more energy than inner shells? The energy of an electron in the shells is potential energy. This is the energy required to move an electron from the nucleus to the shell. This is similar to the energy of a satellite. To move a satellite from the surface of the Earth to an orbit that is 1000 miles above the surface of the Earth requires more fuel (energy) than moving a satellite to an orbit of 500 miles above the surface of the Earth. why is electron negatively charged? In 1869, J.J. Thompson discovered a glow emitted from the cathode that increased in size with decrease in gas pressure. Later, he discovered that the glow was coming small charged particles, colliding with atoms in the gas inside the cathode ray tube. He and other scientists agreed to call the charged particles electrons, and they agreed to call the charge negative. Ever since that time, people have said that electrons have negative charge. The word, “negative”, is just a name. People

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