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Ionization Energy

Ionization Energy. e -. e -. e -. e -. e -. e -. e -. e -. 6p. e -. e -. e -. e -. e -. e -. 3p. 4p. 5p. e -. e -. . e -. e -. C. . . . . Li. Be. . B. . . . . Ionization Energy.

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Ionization Energy

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  1. Ionization Energy

  2. e- e- e- e- e- e- e- e- 6p e- e- e- e- e- e- 3p 4p 5p e- e-  e- e- C     Li Be  B     Ionization Energy • The amount of energy that is needed to remove an electron from an atom is called ionization energy. • When an atom absorbs ionization energy, the atom will lose its most loosely held electron – a valence electron. • Ionization energy generallyincreases across a period because, in general, the valance electrons are held morestrongly by the nucleus . 520 kJ/mol 900 kJ/mol 801 kJ/mol 1086 kJ/mol

  3. e- e- e- e- e- e- e- e- 6p e- e- e- e- e- e- 3p 4p 5p e- e-  e- e- C     Li Be  B     Ionization Energy • Why are the valence electrons of successive atoms in the same period held more strongly by their nuclei? • Because, although all atoms in the same period have the same number of electron shells, each successive atom has one more proton in the nucleus which attracts the valence electrons more strongly. 520 kJ/mol 900 kJ/mol 801 kJ/mol 1086 kJ/mol

  4. e- e- e- e- e- e- e- e- e- e- e- e- e- e- e- e- e- e- e- 11p 19p e- e- e- e- e- e- e- 3p e- e- e- e- e- e- Na K  e-  Li  Ionization Energy • Ionization energy generallydecreases down a group  because, in general, the valance electrons are held lessstrongly by the nucleus. 520 kJ/mol 496 kJ/mol 419 kJ/mol

  5. e- e- e- e- e- e- e- e- e- e- e- e- e- e- e- e- e- e- e- 11p 19p e- e- e- e- e- e- e- 3p e- e- e- e- e- e- Na K  e-  Li  Ionization Energy • Why are the valence electrons of successive atoms in the same group held less strongly by their nuclei. 520 kJ/mol 496 kJ/mol 419 kJ/mol

  6. e- e- e- e- e- e- e- e- e- e- e- e- e- e- e- e- e- e- e- 11p 19p e- e- e- e- e- e- e- 3p e- e- e- e- e- e- Na K  e-  Li  Ionization Energy • Because, although all successive atoms in the same group have more protons in their nuclei, each successive atom has one more electron shell between the nucleus and the valence which weakens the attraction between them. 520 kJ/mol 496 kJ/mol 419 kJ/mol

  7. Ionization Energy

  8. Ionization Energy

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