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Ions & Chemistry Revision

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  • what are negatively charged ions called?
    anions
  • what happens when an atom gains an electron?
    it becomes negatively charged
  • An electron has what kind of charge?
    negative
  • which element has an electronic configuration of 2,8,1
    sodium
  • which element has an electronic configuration of 2,8,8,2
    calcium
  • Atoms that gain and lose electrons are called _____
    ions
  • Nitrogen, with an atomic number of 7, will gain ____ valence electrons when forming an ionic bond
    3
  • what is the charge of an atom that has lost one electron?
    +1
  • When an atom loses a valence electron, it becomes a _____ ion
    positive
  • when an element is neutral, is it an atom or ion?
    atom
  • which element has an electronic configuration of 2,6
    oxygen
  • what are positively charged ions called?
    cations
  • When an atom gains a valence electron, it becomes a ______ ion
    negative
  • when the number of protons = the number of electrons, the element is... charged or neutral?
    neutral
  • the outermost shell is known as the ____ shell
    valence
  • which element has an electronic configuration of 2,8,7
    chlorine
  • Describe an ion
    Atoms with a positive or negative charge
  • A proton has what charge?
    positive
  • Atoms are most stable when their outer shell is half filled with electrons. true or false?
    false
  • If an element has 3 valence electrons, what charge will likely form on its ion?
    +3
  • what is the electronic configuration of nitrogen?
    2,5
  • what is the charge of an atom that has gained one electron?
    -1
  • what is the electronic configuration of carbon?
    2,4
  • what happens when an atom loses an electron?
    it becomes positively charged
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