2The Periodic Table is Divided into Sections by Jagged Red Line! MetalsNonmetalsMetalloidsMetals – left of red lineNonmetals – right of red lineMetalloids – touch TWO SIDES of red lineNotice there are Exceptions:HydrogenAluminumPolonium
3Color-code your periodic table! Metals Nonmetals Metalloids
5Properties of… Which is…. Shiny or Dull? Bendable or Brittle? Solids or Powders/Liquids?Good or Poor Conductors?MetalsNonmetalsShiny (when polished)DullBendableBrittleSolidsPowders, Liquids, GasesGood ConductorsPoor Conductors
6The Periodic Table has rows and columns! The rows are called PERIODS.The columns are called GROUPS or FAMILIES.FamilyPeriod
7Periods and Families are Numbered! 1 2Renumber your Families…*Instructions in class!What element is found in Group2, Period 3?Magnesium123
8Groups/Families are Given Names Boron FamilyGroup 4Carbon FamilyGroup 5Nitrogen FamilyGroup 6ChalcogensGroup 7HalogensGroup 8Noble GasesGroup 1Alkali MetalsGroup 2Alkaline Earth MetalsGroups between 2 & 3Transition Metals
9Elements are grouped in FAMILIES because they are RELATED! DEMO –SodiumLithiumBoth react with water!TIME FOR A LAB!
10The Periodic Table Lists ELEMENTS!! Each element has a square with information in it.NameSymbolAtomic NUMBER (number in upper right-hand corner)Atomic MASS (bottom)
11Elements are IN ORDER by Atomic Number! Two rows at bottomLanthanide SeriesActinide SeriesThey’re pulled out so the table isn’t so wide.Why is the atomic number so great?
12The Atomic NUMBER tells you the NUMBER OF PROTONS! NUMBER OF PROTONS = NUMBER OF ELECTRONSHow many protons are in an atom of Silver?47How many electrons?
13So What Does the Atomic MASS tell you? The Atomic MASS is the MASS of the atom!What is the HEAVIEST part of the atom?Protons & Neutrons(Electrons are nearly weightless)So, the MASS is the SUM of protons and neutrons.Atomic MassWhat is the Atomic MASS of an atom of Silver?108 (round up)How many NEUTRONS are in one atom of Silver??Mass – Protons = Neutrons108 – 47 = 61
14Let’s Practice A Few…How many protons, electrons, and neutrons are in ONE atom of Helium?Protons2ElectronsNeutrons2 (4 – 2 = 2)
15What about for an atom of… Platinum?Protons78ElectronsNeutrons117 (195 – 78 = 117)
17Can You Do a Tricky One?You found a sample of an element! With some careful testing, you determine there are 18 protons in each atom of the sample. What element did you find?Argon!So, the number of protons (& electrons) DEFINES an element.
18Review Why is the Periodic Table shaped so funny? In order by increasing Atomic NumberFamiliesMetals/Nonmetals/MetalloidsBottom 2 rows pulled outSpace below HydrogenCalculate protons, neutrons, & electrons for Lithium.