Sub-atomic particles/Size of Atom

• Protons

  Positively charged, relative mass of 1
• Atoms are very small, with a radius around 1 * 10^-10 m
• Neutrons

  Neutral, relative mass of 1
• Nucleus


  Central region of an atom, with a radius less than 1,000th the radius of the atom
• Nucleus

  • Contains protons (positive charge) and neutrons (no charge)
  • Has an overall positive charge
• Sub-atomic particles

  • Protons
  • Neutrons
  • Electrons