atomic structure

• is an atom neutral overall + does this determine whether the electrons + protons are the same amount?

  • yes
  • it does determine this
• what does the number of outer electrons determine?


  the group of the atom
• what does the number of electron shells determine?


  The period of the atom
• how many electrons can fit in the first shell? 


  2
• how many electrons can fit in the outer shells? 


  8
• what are atoms?

  the building blocks of all matter
• describe the structure of an atom

  a nucleus surrounded by shells of electrons
• what does the nucleus contain?

  protons + neutrons
• which three subatomic particles do atoms contain?

  • protons
  • electrons
  • neutrons
• what is the relative mass of a proton?

  1
• what is the relative atomic mass of a neutron?

  1
• what is the relative mass of an electron?

  1/2000
• what is the relative charge of protons?

  +1
• what is the relative charge of neutrons?

  0
• what is the relative charge of an electron?

  -1
• what is the atomic number?

  the number of protons in the nucleus of an atom
• what is the mass number?

  the sum of the number of protons + neutrons in the nucleus of an atom