Periodic table trends
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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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Periodic Table Trends

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Periodic table trends

Periodic Table Trends


Atomic radius

Atomic Radius

  • Half the distance between the nuclei of two identical atoms bonded together


Atomic radius1

Atomic Radius


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 energy1

Ionization Energy


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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