The fundamental ideas in chemistry

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  • Created by: mathu
  • Created on: 13-06-12 16:37

Atoms

  • all substances are made of atoms
  • an element is something that is made of only one type of atom
  • 100 different elements
  • groups of periodic table contain elements with similar properties
  • protons have positive charge, electrons have negative charge
  • number of electrons = number of protons
  • atoms have no overall charge
  • all atoms of a particular element have the same number of protons
  • electrons occupy the lowest available energy levels (innermost available shells)

The periodic table

  • group 1 elements react…

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