KEY TERMS

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  • SHINY= reflect light (not shiny = dull i.e. does not reflect light)
  • MALLEABLE = can be hammered / rolled into FLAT SHEETS or OTHER SHAPES
  • DUCTILE = can be pulled out / drawn into LONG WIRE
  • CONDUCTIVITY = ability to transfer HEAT or ELECTRICITY to another object
  • MAGNETIC = IRON, COBALT & NICKEL
  • have HIGH MELTING & BOILING POINTS
  • so SOLID at ROOM TEMPERATURE except MERCURY
  • form CATIONS (i.e. lose electrons so the atom is no longer neutral. Instead it becomes a POSITIVE ION which we called a cation)




NB.
  • ATOMS are neutral i.e. they do NOT CARRY a CHARGE
  • If an atom gains or loses electrons it will have either:
    • MORE PROTONS than ELECTRONS i.e. more + charges than - charges .... or
    • LESS PROTONS than ELECTRONS i.e. more - charges than + charges
  • so it will have an overall POSITIVE CHARGE or
an overall NEGATIVE CHARGE
  • atoms with an overall POSITIVE OR NEGATIVE CHARGE are called IONS
if the ION has a POSITIVE CHARGE it is called a CATION
if the ION has a NEGATIVE CHARGE it is called an ANION







METALS

  • shiny

  • good electrical conductor

  • good heat conductor

  • malleable

  • ductile

  • magnetic

  • high boiling point

  • high melting point

  • form CATIONS

NON-METALS


  • not shiny

  • poor conductors

  • brittle

  • often form ANIONS