Isotopes - nucleus contain more potential (stored) energy....

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Isotopes Isotopes are atoms that have the same number of protons and differ only in the number of neutrons. Three different forms of hydrogen are shown below. Most isotopes are stable but radioactive isotopes are unstable and break down into more stable forms by emitting particles and energy ( radiation) . Radiation can be detected, so radioactive isotopes are useful as labels in scientific research and medical diagnostic procedures. Energy Energy is the capacity to produce change. For example, energy is needed to move matter . Potential energy is energy that is stored in matter. For example, a ball located at the top of a hill will roll down the hill. Due to it's position, it has more potential than an identical ball located at the bottom of the hill. Electrons at greater distances from the
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Unformatted text preview: nucleus contain more potential (stored) energy. Example - Many of the chemical reactions that are associated with energy (ex: photosynthesis) involve electrons moving to higher or lower energy levels. Distribution of Electrons Electron Shells The different energy levels are also called electron shells . The first shell is the K shell, the next is the L, followed by M, N, etc. Electrons in the K shell have the least energy. Electrons that are further from the nucleus have more potential energy . The maximum number of electrons in each shell is given by the formula 2N 2 where N is the shell number. From this formula, the maximum number in each shell is 2, 8, 18, 32, etc. The maximum number of electrons in the last (outer) shell is 8....
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This note was uploaded on 12/15/2011 for the course BIO BSC1010 taught by Professor Gwenhauner during the Fall '10 term at Broward College.

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Isotopes - nucleus contain more potential (stored) energy....

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