Cards (10)

  • Nuclear model of atomic structure
    Most of an atom is empty space, with a positive nucleus containing most of the mass, and negative electrons at the edge
  • Nuclear model
    • Electrons orbit the nucleus at specific distances (energy levels/shells)
    • Positive charge in nucleus due to protons
    • Nucleus also contains neutral particles called neutrons
  • Radius of an atom is around 0.1 nanometer
  • Radius of the nucleus is approximately 1 * 10^-14 m
  • Nearly all the mass of the atom is found in the nucleus
  • Relative charge
    Charge of one particle compared to another particle
  • Relative charge of particles
    • Protons: +1
    • Neutrons: 0
    • Electrons: -1
  • Atoms have no overall charge because the number of electrons equals the number of protons
  • Relative mass
    Mass of one particle compared to another particle
  • Relative mass of particles
    • Protons: 1
    • Neutrons: 1
    • Electrons: much smaller than 1