cc3/4

• Isotopes


  • Carbon-14
  • Carbon-12
• Isotopes


  Atoms of the same element with the same number of protons but different numbers of neutrons
• Isotopes are born with a specific nucleus that contains a certain number of protons and neutrons
• Hydrogen atoms


  • Protium: 1 proton, 0 neutrons
  • Deuterium: 1 proton, 1 neutron
  • Tritium: 1 proton, 2 neutrons (very rare)
• Atomic number


  The number of protons in the nucleus of an atom
• Relative atomic mass (RAM)

  The mean mass of an atom relative to the mass of an atom of carbon-12 which is assigned a mass of 12
• Protons


  Positively charged particles found in the nucleus of an atom
• Neutrons


  Neutral particles found in the nucleus of an atom
• Electrons


  Negatively charged particles that orbit the nucleus of an atom
• If an atom has 5 protons, it will also have 5 electrons in the electron shells
• Electrons have a relative charge of -1
• Neutrons have a relative charge of 0
• Mendeleev was a Russian scientist who developed the periodic table