Subatomic Particles and Structure

• A subatomic particle that carry a negative charge. It is found outside the nucleus, moving in the electron shell.

  Electron
• A subatomic particle that carry a positive charge. It is found inside the nucleus.

  Proton
• A subatomic particle that have no electric charge (neutral). It add mass and help stabilize the nucleus.

  Neutron
• It is an electron that is found in the outermost shell.

  Valence Electron
• What happens if there are too many or too few neutrons?

  Makes the atom unstable
• What do you call atoms of the same element with different neutron numbers?

  Isotopes
• It is the central part of the atom containing protons and neutrons.

  Nucleus
• It is the attraction or repulsion between charged particles.

  Electrostatic Forces
• It is the strong forces that hold protons and neutrons together in the nucleus.

  Nuclear Forces
• What is the charge of a proton?

  +1
• Where are the electrons located in an atom?

  Electron shells
• Which subatomic particles has no charge?

  Neutron
• What is the relative mass of an electron compared to a proton.

  Much smaller
• How do neutrons contribute to the stability of the nucleus?

  Reducing repulsion
• Protons and neutrons are in the electron shells. True or False?

  False
• The atomic number of an element is determined by the number of protons in its nucleus. True or False?

  True