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Periodic Table Trends. Atomic Radius. Half the distance between the nuclei of two identical atoms bonded together. Atomic Radius. Atomic Radius. Across a Period= DECREASES As you add more protons, the attractive force of the nucleus increases, pulling electrons in more closely

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atomic radius
Atomic Radius
  • Half the distance between the nuclei of two identical atoms bonded together
atomic radius2
Atomic Radius
  • Across a Period= DECREASES
    • As you add more protons, the attractive force of the nucleus increases, pulling electrons in more closely
  • Down a Group=INCREASES
    • As you add more energy levels, the size of the electron cloud increases
which of the elements would have the largest radius
Which of the elements would have the largest radius?
  • 13-Aluminum
  • 14-Silicon
  • 17-Chlorine
  • 12- Magnesium
  • 16-Sulfur
ionization energy
Ionization Energy
  • The energy required to remove one electron from a neutral atom.
    • High I.E. – Harder to lose

electrons

    • Low I.E. –Easier to lose

electrons

ionization energy2
Ionization Energy
  • Across a Period=INCREASES
    • Electrons are closer to nucleus, therefore harder to remove
  • Down a Group=DECREASES
    • Electrons are farther from the nucleus, therefore easier to remove
which element would have the lowest ionization energy
Which element would have the lowest ionization energy?
  • 20- Calcium
  • 56- Barium
  • 4- Beryllium
  • 38- Strontium
  • 12-Magnesium
electron affinity
Electron Affinity
  • The energy released when a neutral atom acquires an electron.
  • Elements that really want another electron tend to release more energy (higher E.A.)

Across a period= INCREASES

Down a group= DECREASES

electronegativity
Electronegativity
  • The ability of an atom to attract electrons
  • The most electronegative element is fluorine

Across a Period= INCREASES

Down a Group= DECREASES

which of the elements would have the highest electronegativity
Which of the elements would have the highest electronegativity?
  • 13-Aluminum
  • 14-Silicon
  • 17-Chlorine
  • 12- Magnesium
  • 16-Sulfur
metals vs nonmetals
METALS vs NONMETALS
  • METALLIC CHARACTER
  • Lower I.E. (tend to lose e-)
  • Lower E.N. (don’t want e-)
  • High Luster (shiny!)
  • Good Conductors
  • Malleable and Ductile
  • MOST METALLIC ELEMENT:
  • NONMETALLIC CHARACTER
  • High I.E. (don’t want to lose e-)
  • High E.N. (tend to gain e-)
  • Dull (no luster)
  • Poor Conductors
  • Brittle as solids
  • MOST NONMETALLIC ELEMENT:

Francium

Fluorine

which of the elements would be the least reactive metal
Which of the elements would be the least reactive metal?
  • 13-Aluminum
  • 14-Silicon
  • 17-Chlorine
  • 12- Magnesium
  • 16-Sulfur
which of the elements would be the most reactive nonmetal
Which of the elements would be the most reactive nonmetal?
  • 13-Aluminum
  • 14-Silicon
  • 17-Chlorine
  • 12- Magnesium
  • 16-Sulfur
37 rubidium would have all of the following characteristics except
37-Rubidium would have all of the following characteristics except?
  • High Conductivity
  • High Malleability
  • High Brittleness
  • Solid at Room Temperature
  • 1 Valence Electron
35 bromine would have which one of the following characteristics
35-Bromine would have which one of the following characteristics?
  • High Conductivity
  • High Malleability
  • High Brittleness
  • Solid at Room Temperature
  • 7 Valence Electrons
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