Introduction to the Periodic Table

Warm-Up On your new Drill sheet, write your goal for this unit!

Agenda Warm-Up Paint Chip Investigation Periodic Table Notes with some Videos ..and coloring!!!  Periodic Table Investigation

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

Why? Why did we do this? https://iupac.org/iupac-is-naming-the-four-new- elements-nihonium-moscovium-tennessine-and- oganesson/

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

History of the Periodic Table Created in 1913 By Moseley Modern day periodic table Arranged by increasing atomic number

Basic Info 7 horizontal rows are called periods 2 rows on the bottom are extensions of periods 6 & 7

More Basic Info The 18 vertical columns are called groups or families

Even more Info 2 groups of element Group A: Representative elements (groups 1, 2, 13-18) Group B: Transition elements **Label on PT

Periodic Law Many of the physical and chemical properties of the elements tend to recur in a systematic manner with increasing atomic number

Classifying in the P.T. 3 classes Metals Nonmetals Metalloids

Metals Left of the periodic table Characteristics: Exclude hydrogen High electrical conductivity High luster Ductile Malleable All solids at room temperature except Mercury (Hg)

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

Metalloids Have properties of both metals and nonmetals Formed at the “stair-step line” Elements: Boron, Silicon, Germanium, Arsenic, Antimony, Tellurium, Polonium, Astatine

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

Video of Alkali Metals https://www.youtube.com/watch?v=uixxJtJPVXk https://www.youtube.com/watch?v=HvVUtpdK7xw

Alkaline Earth Metals- Group 2 Elements Beryllium, Magnesium, Calcium, Strontium, Barium, Radium Properties High melting points Reactive, but not as much as alkali metals

Transition Metals AKA: “Group B” metals Have varying properties

Inner Transition Metals- Lanthanide AKA: Rare Earth Metals Extension of Period 6

Inner Transition Metals- Actinide AKA: Rare Earth Metals Extension of period 7 Radioactive

Halogens- Group 7A Elements: Properties Fluorine, Chlorine, Bromine, Iodine Properties Reactive with alkali metals and alkaline earth metals

Videos! Reaction of aluminum with bromine https://www.youtube.com/watch?v=uCwHzTsx5yY

Noble Gases- Group 8A Elements Properties: Helium, Neon, Argon, Krypton, Xenon, Radon, Uuo Properties: Odorless Colorless Low chemical reactivity AKA: Inert gases

Time to Color!

Metalloids Have properties of both metals and nonmetals Formed at the “stair-step line” Elements: Boron, Silicon, Germanium, Arsenic, Antimony, Tellurium, Polonium, Astatine

Other Nonmetals Color hydrogen and any elements that are not colored yet and are to the right of the metalloid line

Other Metals Color any element that are not colored yet to the left of the metalloid line

Finish sheet we started in class HW Finish sheet we started in class

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

Sodium in Chlorine gas https://www.youtube.com/watch?v=Ftw7 a5ccubs