forces in the atom– electrons and the nucleus

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Forces in the Atom– Electrons and the Nucleus. Electrons and their levels. negatively charged particles with a mass of 0.0006 a.m.u. (or just put zero) their exact location around the nucleus is not known only know where they are most likely to be found - PowerPoint PPT Presentation

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  • negatively charged particles with a mass of 0.0006 a.m.u. (or just put zero)their exact location around the nucleus is not knownonly know where they are most likely to be foundthis is often called an electron cloud or orbitalmany electron clouds or orbitals can make up an electron level

  • for this class (Physical Science), each level or orbit, can only hold a certain amount of electrons1st up to 2 electrons2nd up to 8 electrons3rd up to 8 electrons (really 18)4th up to 8 electrons (really 32)the properties of elements depends on how many electrons are in a particular atoms different levels.valence electrons are the electrons in the very last or outermost energy level

  • draw a chlorine atom

    and a sodium atom

  • valence electrons are represented as dots around the chemical symbol for the elementNaCl

  • electromagneticopposite charges (+ and -) attractsame charges (+ and +) (- and -) repelthe strong forcegreatest of the four forcesglues the protons togetherthe weak forceimportant in radioactivitygravityweakest of the four forcesfor subatomic particles, it is not understood or may not even work at all

  • http://hyperphysics.phy-astr.gsu.edu/hbase/forces/funfor.html

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