Chemistry
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Chemistry PowerPoint PPT Presentation


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Chemistry. Chemical Families. What are Chemical Families?. A group (column) of elements with similar properties of the periodic table. In Grade 9, we will look at four families. Alkali Metals. Group #: 1

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Chemistry

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Chemistry

Chemistry

Chemical Families


What are chemical families

What are Chemical Families?

  • A group (column) of elements with similar properties of the periodic table.

  • In Grade 9, we will look at four families.


Alkali metals

Alkali Metals

  • Group #: 1

  • Elements Present: Lithium (Li), Sodium (Na), Potassium (K), Rubidium (Rb), Cesium (Cs), Francium (Fr)

  • Physical Properties: Shiny, silvery, soft, low density, solid.

  • Chemical Properties: highly reactive, most reactive metals


Alkaline earth metals

Alkaline Earth Metals

  • Group #: 2

  • Elements Present: Beryllium (Be), Magnesium (Mg), Calcium (Ca), Strontium (Sr), Barium (Ba), Radium (Ra)

  • Physical Properties: Shiny, silvery, harder than group #1, more dense than group #1, solid.

  • Chemical Properties: fairly reactive, burn with colourful flames.


Halogens

Halogens

  • Group #: 17 (Grade 9 >> Group 7)

  • Elements Present: Fluorine (F), Chlorine (Cl), Bromine (Br), Iodine (I), Astantine (At)

  • Physical Properties: Varying states at room temperatures.

  • Chemical Properties: Highly reactive, most reactive non-metals.

    • Fluorine most reactive >> Astantine least reactive

    • Opposite to metals.


Noble gases inert gases

Noble Gases (Inert Gases)

  • Group #: 18 (Grade 9 >> Group 8)

  • Elements Present: Helium (He), Neon (Ne), Argon (Ar), Krypton (Kr), Xenon (Xe), Radon (Rn)

  • Physical Properties: Gases at room temperature, colourless, odourless, tasteless.

  • Chemical Properties:Unreactive (very stable), glow bright colours when current is passed through them.


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