ChemistryCode 9701

Isotopes

What this topic asks you to be able to do

  • define an isotope by referring to how many protons and neutrons it contains
  • understand how isotopes are written as x yA, with x standing for the mass or nucleon number and y standing for the atomic or proton number
  • state that isotopes of a single element have identical chemical properties, and account for why this is so
  • state that isotopes of one element have different physical properties, limited to mass and density, and account for why this happens