Patterns in properties (C1a) (Edexcel)

A Map of the Elements

•  Approximately 116 different elements. 
•  A chemical element is A substance made of only one type of atom. An element can't be turned into another element or anything simpler using a chemical reaction. 
•  The chemical symbols for: ... are... 
  • Sodium: Na
  • Iron: Fe
  • Chlorine: Cl
  • Neon: Ne
• Most elements are metals.
• One advantage of using a chemical symbol instead of chemical names is it doesn't take as long to write an equation.
• One disadvantage would be that the symbol doesn't always correspond to the name of the element e.g. Sn = Tin - This would make it hard to remember.
• Chemical symbols have two letters rather than one because other wise there would be repeats because there are 116 elements but only 26 letters in the alphabet. 
• Approximately 21/116 are non-metals. 
• Group 1: Alkali Metals 
• Group 2: Transition Metals
• Group 0: Noble Gases 
• Group 7: Halogens 

Uses of Iron, Copper, Silver and Gold

• Metals have certain properties:
  •  
    •  
      • Shiny
      • Solid at room temperature (except for Mercury)
      • Good conductors of heat and electricity 
      • Malleable
      • Ductile
• The chemical symbols for Iron, Copper, Silver and Gold are:
  •  Fe
  • Cu
  • Ag
  • Au
• Iron (and most steels) would be a poor choice for making a water pipe because it rusts when in contact with air and water. This is known as corrosion and it damages the metal. 
• Stainless steel contains chromium and other metals such as nickel. It resists corrosion, making it useful for kitchen sinks and cutlery.

• Some steel object are often painted to stop them rusting. Razor blades…