periodic table

• Dmitri Mendeleev


  Father of Periodic Table (he didn't invent it but his version's only right/accurate)
• Property


  Characteristics or trait that you can use to describe matter by observation
• Metals


  • Left side of zigzag line
  • Solid at room temperature
• Properties of Metals


  • Luster - shiny
  • Ductile - can be drawn into wire
  • Malleable - can be hammered into sheets/flat
  • High Melting Point - dense and solid except mercury
  • Conductors - good conductors of electricity and heat
  • Corrosion and Rust - reaction with water and oxygen
  • Sonorous - ringing sound
• Non-Metals


  • Right side of zigzag line including Hydrogen
  • Gases at room temperature
• Properties of Non-Metals (opposite of metals)

  • Dull
  • Brittle - break easily
  • Low Density - particles are far from each other
  • Low Melting Point
  • Poor Conductors - of heat and electricity
• Metalloids (metal-like)


  • Shiny or Dull
  • Conduct Electricity & Heat better than Non-metals but not as well as Metals
  • Malleable & Ductile
  • All Solid
• Periodic Law


  • Atoms with similar properties called group or families
  • They all have same number of valence electrons
• Periodic Trend


  The pattern & relationship that exist of periodic element as they are arranged
• Atomic Trend


  • The measure of atomic size
  • The number of higher energy level; much higher of atomic size
  • Increase from top to bottom / Increase atomic radius (cos, new energy level / higher energy level)
  • Left to Right (period) - Stronger attraction, pulls electrons around closer which causes the atoms become smaller as we move left to right across a period
• Ionization Energy


  • The energy required to remove an electron from an atom
  • Number of proton & electron are not equal
  • The atom has been "ionized" or changed
  • Ionization energy & atomic radius are inversely proportional
• Metallic Character


  • Measure of how easily an atom less its electrons
  • (non-metal) metalic (decrease) left to right - hard to lose electron
  • (metal) metalic (increases) up to bottom - easy to lose electron