Families of elements
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Families of Elements. Three Groups of Elements. Metals Nonmetals Semiconductors or Metalloids. Metals. They are shiny solids that can be stretched and shaped. They are good conductors of heat and electricity. Nonmetals. May be solid, liquids or gases.

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Families of Elements

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Families of elements

Families of Elements


Three groups of elements

Three Groups of Elements

  • Metals

  • Nonmetals

  • Semiconductors or Metalloids


Metals

Metals

  • They are shiny solids that can be stretched and shaped.

  • They are good conductors of heat and electricity.


Nonmetals

Nonmetals

  • May be solid, liquids or gases.

  • If a solid nonmetal they are typical dull, brittle and poor conductors of heat and electricity.


Semiconductors

Semiconductors

  • Non-metals that can conduct under certain conditions.

  • Display properties of metals and non-metals.


Concept check

Concept Check

  • Which is it?

    • Oxygen

    • Sodium

    • Silicon

    • Radon


Families within the periodic table

Families within the Periodic Table

  • Alkali Metals

  • Alkaline Earth Metals

  • Halogens

  • Noble Gases


Alkali metals

Alkali Metals

  • Reactive

  • Most of them are shiny

  • Very reactive because it has one valence electron.

  • They want to have full octet.


Alkaline earth metals

Alkaline-earth Metals

  • Less reactive than Alkali metals but can still be very reactive.

  • Reactive to form +2 ions.

  • A lot of them are found in the human body.


Radon

Radon

  • Uranium can degrade into Radon.

  • Radon having similar properties as Calcium can replace it in bones.

  • This caused major issues after Chernobyl


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