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8th grade chemistry:  II. Periodic Table
 
How is the Modern Periodic Table Organized?

The common modern periodic table is organized by atomic number (thanks, Mosley!). From there we classify metals vs. non-metals (and metalloids) and group elements into Families like Alkali Metals, Halogens, and Noble Gases. Groups vs. Periods : Groups are the COLUMNS (vertical, up-down). Periods are the ROWS (horizontal, side-to-side) . Metals vs. Non-Metals The first big grouping within the modern Periodic Table is whether an element is a metal, non-metal, or metalloid (semi-metal).

1. Metals: Physical Properties:
  • Good conductors of electricity and heat
  • Solid at room temperature (Except Hg)
  • Malleable and ductile (easily formed into shapes)
  • Lusterous (shiny, shiny, shiny)Chemical Properties:
    Chemical Properties:
  • Tend to have 1, 2, or 3 valence electrons (said it before, will say it again - for Main Group elements the number of valence electrons matches the Group A number!)
  • Quick (and happy) to give up valence electrons to form CATIONS
Picture
2. Nonmetals :

Physical Properties
  • Poor conductors of electricity and heat
  • Solid, Liquid or Gasat room temperature
  • Solids are brittle when smacked (generally)
  • Kind of dull, though can be colorful!



Chemical Properties:
  • Tend to have 1, 2, or 3 valence electrons (said it before, will say it again - for Main Group elements the number of valence electrons matches the Group A number!)
  • Quick (and happy) to give up valence electrons to form CATIONS


Picture

keentween

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  • AP Bio
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      • :: Part 1
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    • :: Hox Genes
    • :: Hardy-Weinberg Principle
    • :: Rule of Multiplication + Addition for Punnett Squares
    • :: Patterncount
    • :: CRISPR
    • :: Amino Acid
    • :: Peptide
    • :: Why study Peptides
    • :: Aquaporins
    • :: Gram Stains
    • :: Graph on Excel for Bio Lab
  • AP Chem
    • I. Properties of Matter >
      • Neutralization
    • II. Periodic table >
      • Org of Periodic Table
      • :: Groups
    • III. Chemical bonding >
      • :: Mass to Mass conversion
      • :: Naming Acids
      • :: Cross Drop Charge
      • :: Predicting Products
      • :: Balance Equation Question
      • :: Learn to Balance Equation
      • :: VSEPR Simulation
    • IV. Molar Mass >
      • ::LR ER and excess reatant
      • :: Molecular/Formula Mass
      • :: Empirical Formula & Molar Mass
      • :: Percentages & Empirical Formula
      • :: Empirical formula
    • IV. Solutions and Solubility >
      • :: Solubility Curve
    • V. Easy Tricks and Tips >
      • :: Tip to Molecular Shapes
      • Memorizing Bond Angles and Polarity
      • :: Chemistry Formulas
      • :: Trick Polyatomic ions
    • VI. General AP Concepts >
      • :: Potential Energy Diagrams
      • :: Haber-Bosch
      • :: Le Chatelier
      • :: Pressure & Moles
      • ::Rydberg's Constant vs Unit of Energy
      • :: Equilibrium and RICE Tables
      • :: Kinetics
      • Galvanic Cells
    • :: Flash cards
    • :: VSEPR
  • AP Statistics
    • Standardized Scores
    • Distributions Transformations
  • AP Calc
    • DI Method - Tabular Integration
    • Polar Curves: Tangent Line and Slope
    • Riemann Sums: Left and Right Approximations
    • :: Conic Sections Flash cards
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    • Applying Trig Identities
    • L'Hopital's Rule
    • Differences Between Conic Sections
    • Graphing Conic Sections
    • :: Pre-Calc - Trig Identities
    • Tangent & Normal Lines
    • Indefinite integrals: U Sub
    • Calculus Derivatives >
      • Product Rule
      • Quotient Rule
      • Chain Rule
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