Atomic Structure

• What is the relative mass of a proton?

  1
• What is the relative mass of a neutron?

  1
• What is the relative mass of an electron?

  basically 0
• What is the charge of a proton?

  +1
• What is the relative charge of a neutron?


  0
• What is the charge of an electron?

  -1
• What is the typical radius of an atom?

  $1\times10^{-10}m$
• Compare the radius of the nucleus to the atom?

  10,000 times smaller
• How much of the mass is concentrated at the nucleus?

  Almost all.
• How are electrons arranged?

  Electrons are at different distances from the nucleus (energy levels)