Elements,isotopes and relative atomic mass

• Protons

  Determine which element the atom is
• Elements

  • Hydrogen
  • Helium
  • Around 100 different elements
• Periodic table

  Organizes the elements, with each box representing a different element (nuclear symbol)
• Atomic number

  Unique to each element, represents the number of protons in the atoms of that element
• Nuclear symbol

  One or two letter symbol that represents the element name
• Isotopes

  Different forms of the same element that have the same number of protons but a different number of neutrons
• Relative atomic mass

  The average mass of all the isotopes that make up a particular element
• Calculating relative atomic mass

  Sum of isotope abundance times isotope mass, divided by the sum of the abundances of all the isotopes
• The relative atomic mass of copper is 63.6