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• What is a term that describes what all things are made up of?

  Atom
• What does an element contain?


  One type of atom
• What is a mixture?


  Two or more elements or compounds that are not chemically bonded
• What is a compound?


  Two or more different elements chemically bonded
• Who created the first periodic table?

  Mendeleev
• What did Mendeleev leave in his periodic table?


  Gaps for undiscovered elements
• What was discovered to fill one of Mendeleev's gaps?


  Gallium
• How are elements arranged in the periodic table?


  By increasing atomic number
• What do elements in the same group have in common?


  Similar chemical reactions
• What is a physical property?


  Something that can be measured or observed
• What is a chemical property?


  How a substance behaves when it reacts
• Which group is chlorine (Cl) in?

  Group 7
• Which group is sodium (Na) in?


  Group 1
• Which group is cobalt (Co) in?


  Transition metals
• Which element is the odd one out: Li, Na, Mg, K, Rb, Cs?


  Mg
• Where are all the metals located on the periodic table?


  On the left side
• Is calcium a metal?


  Yes
• Is oxygen a metal?


  No
• Is mercury (Ag) a metal?


  Yes
• What are the properties of metals?


  • Solid at room temperature (except mercury)
  • Malleable (can be hammered into sheets)
  • Ductile (can be drawn into wires)
  • Good conductors of electricity and heat
• What are the properties of non-metals?


  • Poor conductors of electricity and heat
  • Brittle (shatter when hit)
  • Dull appearance
• What is titanium used for?


  Making aeroplanes
• What is aluminum used for?


  Making pie tins
• What is copper used for?


  Electrical wires
• What are some uses of non-metals?


  • Polymer fibers for oven gloves
  • Papers for writing
  • Alarm trigger points
• What year did Mendeleev create his periodic table?


  1869
• What are the differences between Mendeleev's table and the present periodic table?


  • Mendeleev had gaps for undiscovered elements
  • Elements were arranged by atomic mass rather than atomic number
• What is the atomic mass of Beryllium in Group 2?


  9
• What is the atomic symbol for sodium?


  Na
• What is the atomic symbol for chlorine?


  Cl
• What is the atomic symbol for carbon?


  C
• What is the atomic symbol for hydrogen?


  H
• What is the atomic symbol for mercury?


  Hg
• What is the atomic symbol for titanium?


  Ti
• What is the atomic symbol for aluminum?


  Al
• What is the atomic symbol for platinum?


  Pt
• What is the atomic symbol for gallium?


  Ga
• What is the atomic symbol for francium?


  Fr
• What is the atomic symbol for beryllium?


  Be
• What is the atomic symbol for potassium?

  K