2.1 Atomic structure and isotopes

Cards (8)

  • Atoms are made from subatomic particles called protons, neutrons and electrons
  • Protons and neutrons are located in the nucleus of the atom while electrons are located in the outer shell of the atom
  • Relative mass of protons and neutrons are 1, and 1/2000 for electrons
  • Relative charge of a proton is +1
  • Relative charge of a neutron is 0
  • Relative charge of an electron is -1
  • Isotopes are atoms of the same element with different number of neutrons
  • Chemical properties of an element are determined by the number of electrons in the outer shell