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Introduction to the Periodic Table
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Warm-Up On your new Drill sheet, write your goal for this unit!
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Agenda Warm-Up Paint Chip Investigation
Periodic Table Notes with some Videos ..and coloring!!! Periodic Table Investigation
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Paint Chip Investigation
Arrange the paint chips by color, left to right in the order of the rainbow (ROYGBIV) **There is no Indigo Arrange the shades of each color, top to bottom, from light to dark There should be 6 shades in the column
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Why? Why did we do this? elements-nihonium-moscovium-tennessine-and- oganesson/
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History of the Periodic Table
Created in 1869 By Mendeleev Arranged by atomic weight Going down- had similar properties Able to predict behaviors of elements
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History of the Periodic Table
Created in 1913 By Moseley Modern day periodic table Arranged by increasing atomic number
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Basic Info 7 horizontal rows are called periods
2 rows on the bottom are extensions of periods 6 & 7
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More Basic Info The 18 vertical columns are called groups or families
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Even more Info 2 groups of element
Group A: Representative elements (groups 1, 2, ) Group B: Transition elements **Label on PT
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Periodic Law Many of the physical and chemical properties of the elements tend to recur in a systematic manner with increasing atomic number
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Classifying in the P.T. 3 classes Metals Nonmetals Metalloids
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Metals Left of the periodic table Characteristics: Exclude hydrogen
High electrical conductivity High luster Ductile Malleable All solids at room temperature except Mercury (Hg)
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Nonmetals Right side of the periodic table Characteristics
Include Hydrogen Characteristics Poor conductors of electricity Not malleable or have luster Some are gases at room temperature and some are solids Bromine is a liquid
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Metalloids Have properties of both metals and nonmetals
Formed at the “stair-step line” Elements: Boron, Silicon, Germanium, Arsenic, Antimony, Tellurium, Polonium, Astatine
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Alkali Metals- Group 1 Elements Properties
Lithium, sodium, potassium, rubidium, cesium, and francium Properties Highly reactive Generally silver in color Soft Have low melting points and densities
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Video of Alkali Metals https://www.youtube.com/watch?v=uixxJtJPVXk
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Alkaline Earth Metals- Group 2
Elements Beryllium, Magnesium, Calcium, Strontium, Barium, Radium Properties High melting points Reactive, but not as much as alkali metals
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Transition Metals AKA: “Group B” metals Have varying properties
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Inner Transition Metals- Lanthanide
AKA: Rare Earth Metals Extension of Period 6
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Inner Transition Metals- Actinide
AKA: Rare Earth Metals Extension of period 7 Radioactive
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Halogens- Group 7A Elements: Properties
Fluorine, Chlorine, Bromine, Iodine Properties Reactive with alkali metals and alkaline earth metals
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Videos! Reaction of aluminum with bromine
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Noble Gases- Group 8A Elements Properties:
Helium, Neon, Argon, Krypton, Xenon, Radon, Uuo Properties: Odorless Colorless Low chemical reactivity AKA: Inert gases
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Time to Color!
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Metalloids Have properties of both metals and nonmetals
Formed at the “stair-step line” Elements: Boron, Silicon, Germanium, Arsenic, Antimony, Tellurium, Polonium, Astatine
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Other Nonmetals Color hydrogen and any elements that are not colored yet and are to the right of the metalloid line
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Other Metals Color any element that are not colored yet to the left of the metalloid line
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Finish sheet we started in class
HW Finish sheet we started in class
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Exit Slip Give the group name of the following:
Cl Sr Mo U He K Classify each element below as a metal, metalloid, or nonmetal K Ag C O As
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Sodium in Chlorine gas a5ccubs
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