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8th Grade The Periodic Table.

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Presentation on theme: "8th Grade The Periodic Table."— Presentation transcript:

1 8th Grade The Periodic Table


3 Dmitri Mendeleev Discovered that patterns appeared when elements were arranged in order of increasing atomic mass. He published the first periodic table.

4 Arranged by similar properties
Periodic Table Made up of elements Arranged by similar properties

5 Groups or Families Vertical columns on the table – indicate # of valance electrons...number yours now! Elements have similar properties

6 Groups or Families (cont)
Group 1-Alkali Metals Group 2 Alkaline Earth Metals Groups 3-12 Transition Metals Groups – Named by top element in each group

7 Groups (cont) Group 13-Boron Family Group 14-Carbon Family Group 15-Nitrogen Family Group 16-Oxygen Family Group 17 – Halogens Group 18 – Noble Gases

8 Periods Horizontal line of elements
Arranged by number of electron energy levels Each period has the same number of shells. Text

9 Lithium (Period 2) – only valence electron shown
Energy Level Example Lithium (Period 2) – only valence electron shown

10 Metals, Non Metals, & Metalloids
Elements separated by zigzag line. Left of line are metals Right of line are non-metals Elements on either side of zigzag are metalloids.


12 METALS Elements on the LEFT side of the periodic table; have a shiny surface and are good conductors of electricity

13 NON METALS Elements on the RIGHT side of the periodic table; dull and are not good conductors of electricity

14 METALLOIDS Elements that are to the LEFT AND RIGHT of the zigzag line; have some characteristics of metal and non metal

15 Periodic Table Mini Quiz. you may use your notes
Periodic Table Mini may use your notes. Directions: Get out paper and answer the following questions.

16 Answers!!! 1. Alkali metals 2. Cl, F, Br, I
3. Eight, except Helium which has only 2 valence electrons. 4. Number of valence electrons. 5. They are the same. 6. The number of shells. 7. Either side of the zigzag line on the periodic table. 8. To separate the metals from the nonmetals. Text

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