Periodic table

• The first periodic table was created in 1862 by A.E. Beguyer de Chacaurtois.

  1869- Russian Dmitri Mendeleeve published his periodic table eventually claiming the name , ‘ father of the periodic table’

  The periodic table is a systematic arrangement of chemical elements organized in periods (horizontal) and groups (vertical) base on atonic structure and properties.
• • They are 7 periods in the periodic table labelled from 1-7. each period represents a new shell for electrons in the atoms of the elements within that period
  • they are 8 groups in the periodic table (1,2,3,4,5,6,7,0)
  • they’re 118 elements in title on the periodic table.
• Transition elements do not necessarily belong to a particular group as they fall into many groups
• properties

  • A property is something that describes how a substrate behaves. There are two types of properties
  • chemical changes : happen when chemical reactions occur. They involve the formation of new chemical or compound
  • physical changes : when a substrate simply changes state. For example from solid to liquid.
• Evidence for a chemical reactions can include the following

  • bubbles
  • color change
  • A large energy change
• Redox reaction

  • the word redox is a combinations of two words Reduction and Oxidation.
  • reduction is the loss of oxygen where as oxidation is oxygen gain.
  • E.G: carbon + oxygen = CO2